Add 4.2 branch to README

Send NOTIFICATION_POSTINITIALIZE to extension classes

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,71 @@
+name: Bug report
+description: Report a bug in the godot-cpp GDExtension/GDNative integration
+body:
+
+- type: markdown
+  attributes:
+    value: |
+      - When reporting bugs, you'll make our life simpler (and the fix will come sooner) if you follow the guidelines in this template.
+      - Write a descriptive issue title above.
+      - The golden rule is to **always open *one* issue for *one* bug**. If you notice several bugs and want to report them, make sure to create one new issue for each of them.
+      - Search [open](https://github.com/godotengine/godot-cpp/issues) and [closed](https://github.com/godotengine/godot-cpp/issues?q=is%3Aissue+is%3Aclosed) issues to ensure it has not already been reported. If you don't find a relevant match or if you're unsure, don't hesitate to **open a new issue**. The bugsquad will handle it from there if it's a duplicate.
+      - Verify that you are using a [supported Godot version](https://docs.godotengine.org/en/stable/about/release_policy.html).
+
+- type: input
+  attributes:
+    label: Godot version
+    description: >
+      Specify the Git commit hash if using a development or non-official build.
+      If you use a custom build, please test if your issue is reproducible in official builds too.
+    placeholder: 3.3.stable, 4.0.dev (3041becc6)
+  validations:
+    required: true
+
+- type: input
+  attributes:
+    label: godot-cpp version
+    description: >
+      Specify the Git commit hash if using a development build.
+    placeholder: 3.3.stable, 4.0.dev (3041becc6)
+  validations:
+    required: true
+
+- type: input
+  attributes:
+    label: System information
+    description: |
+      - Specify the OS version, and when relevant hardware information.
+      - For issues that are likely OS-specific and/or graphics-related, please specify the CPU model and architecture.
+      - **Bug reports not including the required information may be closed at the maintainers' discretion.** If in doubt, always include all the requested information; it's better to include too much information than not enough information.
+    placeholder: Windows 10, Intel Core i5-7200U
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: Issue description
+    description: |
+      Describe your issue briefly. What doesn't work, and how do you expect it to work instead?
+      You can include images or videos with drag and drop, and format code blocks or logs with <code>```</code> tags.
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: Steps to reproduce
+    description: |
+      List of steps or sample code that reproduces the issue. Having reproducible issues is a prerequisite for contributors to be able to solve them.
+      If you include a minimal reproduction project below, you can detail how to use it here.
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: Minimal reproduction project
+    description: |
+      - A small Godot project which reproduces the issue, with no unnecessary files included. Be sure to not include the `.godot` folder in the archive (but keep `project.godot`).
+      - Required, unless the reproduction steps are trivial and don't require any project files to be followed. In this case, write "N/A" in the field.
+      - Drag and drop a ZIP archive to upload it. **Do not select another field until the project is done uploading.**
+      - **If you've been asked by a maintainer to upload a minimal reproduction project, you *must* do so within 7 days.** Otherwise, your bug report will be closed as it'll be considered too difficult to diagnose.
+  validations:
+    required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,14 @@
+blank_issues_enabled: false
+
+contact_links:
+  - name: Godot proposals
+    url: https://github.com/godotengine/godot-proposals
+    about: Please submit feature proposals on the Godot proposals repository, not here.
+
+  - name: Godot documentation repository
+    url: https://github.com/godotengine/godot-docs
+    about: Please report issues with documentation on the Godot documentation repository, not here.
+
+  - name: Godot community channels
+    url: https://godotengine.org/community
+    about: Please ask for technical support on one of the other community channels, not here.

.github/workflows/ci.yml

@@ -22,6 +22,7 @@ jobs:
             platform: linux
             artifact-name: godot-cpp-linux-glibc2.27-x86_64-release
             artifact-path: bin/libgodot-cpp.linux.template_release.x86_64.a
+            run-tests: true
             cache-name: linux-x86_64
 
           - name: 🐧 Linux (GCC, Double Precision)
@@ -30,6 +31,7 @@ jobs:
             artifact-name: godot-cpp-linux-glibc2.27-x86_64-double-release
             artifact-path: bin/libgodot-cpp.linux.template_release.double.x86_64.a
             flags: precision=double
+            run-tests: false
             cache-name: linux-x86_64-f64
 
           - name: 🏁 Windows (x86_64, MSVC)
@@ -37,6 +39,7 @@ jobs:
             platform: windows
             artifact-name: godot-cpp-windows-msvc2019-x86_64-release
             artifact-path: bin/libgodot-cpp.windows.template_release.x86_64.lib
+            run-tests: false
             cache-name: windows-x86_64-msvc
 
           - name: 🏁 Windows (x86_64, MinGW)
@@ -45,6 +48,7 @@ jobs:
             artifact-name: godot-cpp-linux-mingw-x86_64-release
             artifact-path: bin/libgodot-cpp.windows.template_release.x86_64.a
             flags: use_mingw=yes
+            run-tests: false
             cache-name: windows-x86_64-mingw
 
           - name: 🍎 macOS (universal)
@@ -53,6 +57,7 @@ jobs:
             artifact-name: godot-cpp-macos-universal-release
             artifact-path: bin/libgodot-cpp.macos.template_release.universal.a
             flags: arch=universal
+            run-tests: false
             cache-name: macos-universal
 
           - name: 🤖 Android (arm64)
@@ -60,7 +65,8 @@ jobs:
             platform: android
             artifact-name: godot-cpp-android-arm64-release
             artifact-path: bin/libgodot-cpp.android.template_release.arm64.a
-            flags: ANDROID_NDK_ROOT=$ANDROID_NDK_LATEST_HOME arch=arm64
+            flags: arch=arm64
+            run-tests: false
             cache-name: android-arm64
 
           - name: 🍏 iOS (arm64)
@@ -69,14 +75,25 @@ jobs:
             artifact-name: godot-cpp-ios-arm64-release
             artifact-path: bin/libgodot-cpp.ios.template_release.arm64.a
             flags: arch=arm64
+            run-tests: false
             cache-name: ios-arm64
 
+          - name: 🌐 Web (wasm32)
+            os: ubuntu-20.04
+            platform: web
+            artifact-name: godot-cpp-web-wasm32-release
+            artifact-path: bin/libgodot-cpp.web.template_release.wasm32.a
+            run-tests: false
+            cache-name: web-wasm32
+
     env:
       SCONS_CACHE: ${{ github.workspace }}/.scons-cache/
+      EM_VERSION: 3.1.39
+      EM_CACHE_FOLDER: "emsdk-cache"
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
@@ -91,19 +108,29 @@ jobs:
         with:
           python-version: '3.x'
 
-      - name: Linux dependencies
-        if: ${{ matrix.platform == 'linux' }}
-        run: |
-          sudo apt-get update -qq
-          sudo apt-get install -qqq build-essential pkg-config
+      - name: Android dependencies
+        if: ${{ matrix.platform == 'android' }}
+        uses: nttld/setup-ndk@v1
+        with:
+          ndk-version: r23c
+          link-to-sdk: true
 
-      - name: Install scons
-        run: |
-          python -m pip install scons==4.0.0
+      - name: Web dependencies
+        if: ${{ matrix.platform == 'web' }}
+        uses: mymindstorm/setup-emsdk@v13
+        with:
+          version: ${{env.EM_VERSION}}
+          actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
 
       - name: Setup MinGW for Windows/MinGW build
         if: ${{ matrix.platform == 'windows' && matrix.flags == 'use_mingw=yes' }}
         uses: egor-tensin/setup-mingw@v2
+        with:
+          version: 12.2.0
+
+      - name: Install scons
+        run: |
+          python -m pip install scons==4.0.0
 
       - name: Generate godot-cpp sources only
         run: |
@@ -124,6 +151,31 @@ jobs:
           cd test
           scons platform=${{ matrix.platform }} target=template_release ${{ matrix.flags }}
 
+      - name: Download latest Godot artifacts
+        uses: dsnopek/action-download-artifact@1322f74e2dac9feed2ee76a32d9ae1ca3b4cf4e9
+        if: ${{ matrix.run-tests }}
+        with:
+          repo: godotengine/godot
+          branch: master
+          event: push
+          workflow: linux_builds.yml
+          workflow_conclusion: success
+          name: linux-editor-mono
+          search_artifacts: true
+          check_artifacts: true
+          ensure_latest: true
+          path: godot-artifacts
+
+      - name: Run tests
+        if: ${{ matrix.run-tests }}
+        run: |
+          chmod +x ./godot-artifacts/godot.linuxbsd.editor.x86_64.mono
+          ./godot-artifacts/godot.linuxbsd.editor.x86_64.mono --headless --version
+          cd test
+          # Need to run the editor so .godot is generated... but it crashes! Ignore that :-)
+          (cd project && (timeout 10 ../../godot-artifacts/godot.linuxbsd.editor.x86_64.mono --editor --headless --quit >/dev/null 2>&1 || true))
+          GODOT=../godot-artifacts/godot.linuxbsd.editor.x86_64.mono ./run-tests.sh
+
       - name: Upload artifact
         uses: actions/upload-artifact@v3
         with:
@@ -136,7 +188,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
@@ -160,7 +212,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
@@ -184,7 +236,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 

.github/workflows/static_checks.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Azure repositories are not reliable, we need to prevent Azure giving us packages.
       - name: Make apt sources.list use the default Ubuntu repositories

.gitignore

@@ -100,7 +100,7 @@ AppPackages/
 
 # Others
 sql/
-*.Cache
+*.[Cc]ache
 ClientBin/
 [Ss]tyle[Cc]op.*
 ~$*
@@ -191,3 +191,7 @@ godot.creator.*
 
 # compile commands (https://clang.llvm.org/docs/JSONCompilationDatabase.html)
 compile_commands.json
+
+# Python development
+.venv
+venv

CMakeLists.txt

@@ -37,8 +37,8 @@
 # Todo
 # Test build for Windows, Mac and mingw.
 
-project(godot-cpp LANGUAGES CXX)
 cmake_minimum_required(VERSION 3.12)
+project(godot-cpp LANGUAGES CXX)
 
 option(GENERATE_TEMPLATE_GET_NODE "Generate a template version of the Node class's get_node." ON)
 option(GODOT_CPP_SYSTEM_HEADERS "Expose headers as SYSTEM." ON)
@@ -72,21 +72,22 @@ endif()
 # Input from user for GDExtension interface header and the API JSON file
 set(GODOT_GDEXTENSION_DIR "gdextension" CACHE STRING "")
 set(GODOT_CUSTOM_API_FILE "" CACHE STRING "")
-set(FLOAT_PRECISION "single" CACHE STRING "")
-if ("${FLOAT_PRECISION}" STREQUAL "double")
-	add_definitions(-DREAL_T_IS_DOUBLE)
-endif()
 
 set(GODOT_GDEXTENSION_API_FILE "${GODOT_GDEXTENSION_DIR}/extension_api.json")
 if (NOT "${GODOT_CUSTOM_API_FILE}" STREQUAL "")  # User-defined override.
 	set(GODOT_GDEXTENSION_API_FILE "${GODOT_CUSTOM_API_FILE}")
 endif()
 
+set(FLOAT_PRECISION "single" CACHE STRING "")
+if ("${FLOAT_PRECISION}" STREQUAL "double")
+	add_definitions(-DREAL_T_IS_DOUBLE)
+endif()
+
 set(GODOT_COMPILE_FLAGS )
 
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 	# using Visual Studio C++
-	set(GODOT_COMPILE_FLAGS "/EHsc") # /GF /MP
+	set(GODOT_COMPILE_FLAGS "/utf-8") # /GF /MP
 
 	if(CMAKE_BUILD_TYPE MATCHES Debug)
 		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /MDd") # /Od /RTC1 /Zi
@@ -98,15 +99,28 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 
 	add_definitions(-DNOMINMAX)
 else()  # GCC/Clang
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -g")
-
 	if(CMAKE_BUILD_TYPE MATCHES Debug)
-		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0 -g")
 	else()
 		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -O3")
 	endif(CMAKE_BUILD_TYPE MATCHES Debug)
 endif()
 
+# Disable exception handling. Godot doesn't use exceptions anywhere, and this
+# saves around 20% of binary size and very significant build time (GH-80513).
+option(GODOT_DISABLE_EXCEPTIONS ON "Force disabling exception handling code")
+if (GODOT_DISABLE_EXCEPTIONS)
+	if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -D_HAS_EXCEPTIONS=0")
+	else()
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-exceptions")
+	endif()
+else()
+	if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /EHsc")
+	endif()
+endif()
+
 # Generate source from the bindings file
 find_package(Python3 3.4 REQUIRED) # pathlib should be present
 if(GENERATE_TEMPLATE_GET_NODE)
@@ -118,6 +132,7 @@ endif()
 execute_process(COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.print_file_list(\"${GODOT_GDEXTENSION_API_FILE}\", \"${CMAKE_CURRENT_BINARY_DIR}\", headers=True, sources=True)"
 	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 	OUTPUT_VARIABLE GENERATED_FILES_LIST
+	OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
 add_custom_command(OUTPUT ${GENERATED_FILES_LIST}

README.md

@@ -2,8 +2,16 @@
 
 > **Warning**
 >
-> This repository's `master` branch is only usable with Godot's ([GDExtension](https://godotengine.org/article/introducing-gd-extensions))
-> API (Godot 4.0 and later).
+> This repository's `master` branch is only usable with
+> [GDExtension](https://godotengine.org/article/introducing-gd-extensions)
+> from Godot's `master` branch.
+>
+> For users of stable branches, switch to the branch matching your target Godot version:
+> - [`4.2`](https://github.com/godotengine/godot-cpp/tree/4.2)
+> - [`4.1`](https://github.com/godotengine/godot-cpp/tree/4.1)
+> - [`4.0`](https://github.com/godotengine/godot-cpp/tree/4.0)
+>
+> Or check out the Git tag matching your Godot version (e.g. `godot-4.1.1-stable`).
 >
 > For GDNative users (Godot 3.x), switch to the [`3.x`](https://github.com/godotengine/godot-cpp/tree/3.x)
 > or the [`3.5`](https://github.com/godotengine/godot-cpp/tree/3.5) branch.
@@ -49,9 +57,10 @@ first-party `godot-cpp` extension.
 
 Some compatibility breakage is to be expected as GDExtension and `godot-cpp`
 get more used, documented, and critical issues get resolved. See the
-[issue tracker](https://github.com/godotengine/godot/issues) for a list of known
-issues, and be sure to provide feedback on issues and PRs which affect your use
-of this extension.
+[Godot issue tracker](https://github.com/godotengine/godot/issues?q=is%3Aissue+is%3Aopen+label%3Atopic%3Agdextension)
+and the [godot-cpp issue tracker](https://github.com/godotengine/godot/issues)
+for a list of known issues, and be sure to provide feedback on issues and PRs
+which affect your use of this extension.
 
 ## Contributing
 
@@ -73,21 +82,22 @@ just like before.
 
 To use the shared lib in your Godot project you'll need a `.gdextension`
 file, which replaces what was the `.gdnlib` before.
-Follow [the example](test/demo/example.gdextension):
+See [example.gdextension](test/project/example.gdextension) used in the test project:
 
 ```ini
 [configuration]
 
 entry_symbol = "example_library_init"
+compatibility_minimum = "4.1"
 
 [libraries]
 
-macos.debug = "bin/libgdexample.macos.debug.framework"
-macos.release = "bin/libgdexample.macos.release.framework"
-windows.debug.x86_64 = "bin/libgdexample.windows.debug.x86_64.dll"
-windows.release.x86_64 = "bin/libgdexample.windows.release.x86_64.dll"
-linux.debug.x86_64 = "bin/libgdexample.linux.debug.x86_64.so"
-linux.release.x86_64 = "bin/libgdexample.linux.release.x86_64.so"
+macos.debug = "res://bin/libgdexample.macos.debug.framework"
+macos.release = "res://bin/libgdexample.macos.release.framework"
+windows.debug.x86_64 = "res://bin/libgdexample.windows.debug.x86_64.dll"
+windows.release.x86_64 = "res://bin/libgdexample.windows.release.x86_64.dll"
+linux.debug.x86_64 = "res://bin/libgdexample.linux.debug.x86_64.so"
+linux.release.x86_64 = "res://bin/libgdexample.linux.release.x86_64.so"
 # Repeat for other architectures to support arm64, rv64, etc.
 ```
 
@@ -99,8 +109,8 @@ extern "C" {
 
 // Initialization.
 
-GDExtensionBool GDE_EXPORT example_library_init(const GDExtensionInterface *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
-	godot::GDExtensionBinding::InitObject init_obj(p_interface, p_library, r_initialization);
+GDExtensionBool GDE_EXPORT example_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
+	godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization);
 
 	init_obj.register_initializer(initialize_example_module);
 	init_obj.register_terminator(uninitialize_example_module);
@@ -125,6 +135,10 @@ void initialize_example_module(ModuleInitializationLevel p_level) {
 
 Any node and resource you register will be available in the corresponding `Create...` dialog. Any class will be available to scripting as well.
 
-## Included example
+## Examples and templates
 
-Check the project in the `test` folder for an example on how to use and register different things.
+See the [godot-cpp-template](https://github.com/godotengine/godot-cpp-template) project for a
+generic reusable template.
+
+Or checkout the code for the [Summator example](https://github.com/paddy-exe/GDExtensionSummator)
+as shown in the [official documentation](https://docs.godotengine.org/en/latest/tutorials/scripting/gdextension/gdextension_cpp_example.html).

SConstruct

@@ -5,76 +5,26 @@ import platform
 import sys
 import subprocess
 from binding_generator import scons_generate_bindings, scons_emit_files
-from SCons.Errors import UserError
+
 
 EnsureSConsVersion(4, 0)
 
 
-def add_sources(sources, dir, extension):
-    for f in os.listdir(dir):
-        if f.endswith("." + extension):
-            sources.append(dir + "/" + f)
+try:
+    Import("env")
+except:
+    # Default tools with no platform defaults to gnu toolchain.
+    # We apply platform specific toolchains via our custom tools.
+    env = Environment(tools=["default"], PLATFORM="")
 
-
-def normalize_path(val):
-    return val if os.path.isabs(val) else os.path.join(env.Dir("#").abspath, val)
-
-
-def validate_api_file(key, val, env):
-    if not os.path.isfile(normalize_path(val)):
-        raise UserError("GDExtension API file ('%s') does not exist: %s" % (key, val))
-
-
-def validate_gdextension_dir(key, val, env):
-    if not os.path.isdir(normalize_path(val)):
-        raise UserError("GDExtension directory ('%s') does not exist: %s" % (key, val))
-
-
-def get_gdextension_dir(env):
-    return normalize_path(env.get("gdextension_dir", env.Dir("gdextension").abspath))
-
-
-def get_api_file(env):
-    return normalize_path(env.get("custom_api_file", os.path.join(get_gdextension_dir(env), "extension_api.json")))
-
-
-# Try to detect the host platform automatically.
-# This is used if no `platform` argument is passed
-if sys.platform.startswith("linux"):
-    default_platform = "linux"
-elif sys.platform == "darwin":
-    default_platform = "macos"
-elif sys.platform == "win32" or sys.platform == "msys":
-    default_platform = "windows"
-elif ARGUMENTS.get("platform", ""):
-    default_platform = ARGUMENTS.get("platform")
-else:
-    raise ValueError("Could not detect platform automatically, please specify with platform=<platform>")
-
-# Default tools with no platform defaults to gnu toolchain.
-# We apply platform specific toolchains via our custom tools.
-env = Environment(tools=["default"], PLATFORM="")
-
-# Default num_jobs to local cpu count if not user specified.
-# SCons has a peculiarity where user-specified options won't be overridden
-# by SetOption, so we can rely on this to know if we should use our default.
-initial_num_jobs = env.GetOption("num_jobs")
-altered_num_jobs = initial_num_jobs + 1
-env.SetOption("num_jobs", altered_num_jobs)
-if env.GetOption("num_jobs") == altered_num_jobs:
-    cpu_count = os.cpu_count()
-    if cpu_count is None:
-        print("Couldn't auto-detect CPU count to configure build parallelism. Specify it with the -j argument.")
-    else:
-        safer_cpu_count = cpu_count if cpu_count <= 4 else cpu_count - 1
-        print(
-            "Auto-detected %d CPU cores available for build parallelism. Using %d cores by default. You can override it with the -j argument."
-            % (cpu_count, safer_cpu_count)
-        )
-        env.SetOption("num_jobs", safer_cpu_count)
+env.PrependENVPath("PATH", os.getenv("PATH"))
 
 # Custom options and profile flags.
 customs = ["custom.py"]
+try:
+    customs += Import("customs")
+except:
+    pass
 profile = ARGUMENTS.get("profile", "")
 if profile:
     if os.path.isfile(profile):
@@ -82,113 +32,12 @@ if profile:
     elif os.path.isfile(profile + ".py"):
         customs.append(profile + ".py")
 opts = Variables(customs, ARGUMENTS)
-
-platforms = ("linux", "macos", "windows", "android", "ios", "javascript")
-opts.Add(
-    EnumVariable(
-        "platform",
-        "Target platform",
-        default_platform,
-        allowed_values=platforms,
-        ignorecase=2,
-    )
-)
-
-# Editor and template_debug are compatible (i.e. you can use the same binary for Godot editor builds and Godot debug templates).
-# Godot release templates are only compatible with "template_release" builds.
-# For this reason, we default to template_debug builds, unlike Godot which defaults to editor builds.
-opts.Add(
-    EnumVariable("target", "Compilation target", "template_debug", ("editor", "template_release", "template_debug"))
-)
-opts.Add(
-    PathVariable(
-        "gdextension_dir",
-        "Path to a custom directory containing GDExtension interface header and API JSON file",
-        None,
-        validate_gdextension_dir,
-    )
-)
-opts.Add(
-    PathVariable(
-        "custom_api_file",
-        "Path to a custom GDExtension API JSON file (takes precedence over `gdextension_dir`)",
-        None,
-        validate_api_file,
-    )
-)
-opts.Add(
-    BoolVariable("generate_bindings", "Force GDExtension API bindings generation. Auto-detected by default.", False)
-)
-opts.Add(BoolVariable("generate_template_get_node", "Generate a template version of the Node class's get_node.", True))
-
-opts.Add(BoolVariable("build_library", "Build the godot-cpp library.", True))
-opts.Add(EnumVariable("precision", "Set the floating-point precision level", "single", ("single", "double")))
-
-# Add platform options
-tools = {}
-for pl in platforms:
-    tool = Tool(pl, toolpath=["tools"])
-    if hasattr(tool, "options"):
-        tool.options(opts)
-    tools[pl] = tool
-
-# CPU architecture options.
-architecture_array = ["", "universal", "x86_32", "x86_64", "arm32", "arm64", "rv64", "ppc32", "ppc64", "wasm32"]
-architecture_aliases = {
-    "x64": "x86_64",
-    "amd64": "x86_64",
-    "armv7": "arm32",
-    "armv8": "arm64",
-    "arm64v8": "arm64",
-    "aarch64": "arm64",
-    "rv": "rv64",
-    "riscv": "rv64",
-    "riscv64": "rv64",
-    "ppcle": "ppc32",
-    "ppc": "ppc32",
-    "ppc64le": "ppc64",
-}
-opts.Add(EnumVariable("arch", "CPU architecture", "", architecture_array, architecture_aliases))
-
-# Targets flags tool (optimizations, debug symbols)
-target_tool = Tool("targets", toolpath=["tools"])
-target_tool.options(opts)
-
+cpp_tool = Tool("godotcpp", toolpath=["tools"])
+cpp_tool.options(opts, env)
 opts.Update(env)
+
 Help(opts.GenerateHelpText(env))
 
-# Process CPU architecture argument.
-if env["arch"] == "":
-    # No architecture specified. Default to arm64 if building for Android,
-    # universal if building for macOS or iOS, wasm32 if building for web,
-    # otherwise default to the host architecture.
-    if env["platform"] in ["macos", "ios"]:
-        env["arch"] = "universal"
-    elif env["platform"] == "android":
-        env["arch"] = "arm64"
-    elif env["platform"] == "javascript":
-        env["arch"] = "wasm32"
-    else:
-        host_machine = platform.machine().lower()
-        if host_machine in architecture_array:
-            env["arch"] = host_machine
-        elif host_machine in architecture_aliases.keys():
-            env["arch"] = architecture_aliases[host_machine]
-        elif "86" in host_machine:
-            # Catches x86, i386, i486, i586, i686, etc.
-            env["arch"] = "x86_32"
-        else:
-            print("Unsupported CPU architecture: " + host_machine)
-            Exit()
-
-tool = Tool(env["platform"], toolpath=["tools"])
-
-if tool is None or not tool.exists(env):
-    raise ValueError("Required toolchain not found for platform " + env["platform"])
-
-tool.generate(env)
-target_tool.generate(env)
-
 # Detect and print a warning listing unknown SCons variables to ease troubleshooting.
 unknown = opts.UnknownVariables()
 if unknown:
@@ -196,66 +45,12 @@ if unknown:
     for item in unknown.items():
         print("    " + item[0] + "=" + item[1])
 
-print("Building for architecture " + env["arch"] + " on platform " + env["platform"])
-
-# Require C++17
-if env.get("is_msvc", False):
-    env.Append(CXXFLAGS=["/std:c++17"])
-else:
-    env.Append(CXXFLAGS=["-std=c++17"])
-
-if env["precision"] == "double":
-    env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"])
-
-# Generate bindings
-env.Append(BUILDERS={"GenerateBindings": Builder(action=scons_generate_bindings, emitter=scons_emit_files)})
-
-bindings = env.GenerateBindings(
-    env.Dir("."),
-    [get_api_file(env), os.path.join(get_gdextension_dir(env), "gdextension_interface.h"), "binding_generator.py"],
-)
-
 scons_cache_path = os.environ.get("SCONS_CACHE")
 if scons_cache_path is not None:
     CacheDir(scons_cache_path)
     Decider("MD5")
 
-# Forces bindings regeneration.
-if env["generate_bindings"]:
-    AlwaysBuild(bindings)
-    NoCache(bindings)
+cpp_tool.generate(env)
+library = env.GodotCPP()
 
-# Includes
-env.Append(CPPPATH=[[env.Dir(d) for d in [get_gdextension_dir(env), "include", os.path.join("gen", "include")]]])
-
-# Sources to compile
-sources = []
-add_sources(sources, "src", "cpp")
-add_sources(sources, "src/classes", "cpp")
-add_sources(sources, "src/core", "cpp")
-add_sources(sources, "src/variant", "cpp")
-sources.extend([f for f in bindings if str(f).endswith(".cpp")])
-
-suffix = ".{}.{}".format(env["platform"], env["target"])
-if env.dev_build:
-    suffix += ".dev"
-if env["precision"] == "double":
-    suffix += ".double"
-suffix += "." + env["arch"]
-if env["ios_simulator"]:
-    suffix += ".simulator"
-
-# Expose it when included from another project
-env["suffix"] = suffix
-
-library = None
-env["OBJSUFFIX"] = suffix + env["OBJSUFFIX"]
-library_name = "libgodot-cpp{}{}".format(suffix, env["LIBSUFFIX"])
-
-if env["build_library"]:
-    library = env.StaticLibrary(target=env.File("bin/%s" % library_name), source=sources)
-    Default(library)
-
-env.Append(LIBPATH=[env.Dir("bin")])
-env.Append(LIBS=library_name)
 Return("env")

binding_generator.py

@@ -66,14 +66,14 @@ def generate_wrappers(target):
 
     txt += "\n#endif\n"
 
-    with open(target, "w") as f:
+    with open(target, "w", encoding="utf-8") as f:
         f.write(txt)
 
 
 def get_file_list(api_filepath, output_dir, headers=False, sources=False):
     api = {}
     files = []
-    with open(api_filepath) as api_file:
+    with open(api_filepath, encoding="utf-8") as api_file:
         api = json.load(api_file)
 
     core_gen_folder = Path(output_dir) / "gen" / "include" / "godot_cpp" / "core"
@@ -97,9 +97,10 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
             files.append(str(source_filename.as_posix()))
 
     for engine_class in api["classes"]:
-        # TODO: Properly setup this singleton since it conflicts with ClassDB in the bindings.
+        # Generate code for the ClassDB singleton under a different name.
         if engine_class["name"] == "ClassDB":
-            continue
+            engine_class["name"] = "ClassDBSingleton"
+            engine_class["alias_for"] = "ClassDB"
         header_filename = include_gen_folder / "classes" / (camel_to_snake(engine_class["name"]) + ".hpp")
         source_filename = source_gen_folder / "classes" / (camel_to_snake(engine_class["name"]) + ".cpp")
         if headers:
@@ -109,6 +110,8 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
 
     for native_struct in api["native_structures"]:
         struct_name = native_struct["name"]
+        if struct_name == "ObjectID":
+            continue
         snake_struct_name = camel_to_snake(struct_name)
 
         header_filename = include_gen_folder / "classes" / (snake_struct_name + ".hpp")
@@ -121,8 +124,10 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
             include_gen_folder / "variant" / "builtin_binds.hpp",
             include_gen_folder / "variant" / "utility_functions.hpp",
             include_gen_folder / "variant" / "variant_size.hpp",
+            include_gen_folder / "variant" / "builtin_vararg_methods.hpp",
             include_gen_folder / "classes" / "global_constants.hpp",
             include_gen_folder / "classes" / "global_constants_binds.hpp",
+            include_gen_folder / "core" / "version.hpp",
         ]:
             files.append(str(path.as_posix()))
     if sources:
@@ -133,9 +138,7 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
 
 
 def print_file_list(api_filepath, output_dir, headers=False, sources=False):
-    end = ";"
-    for f in get_file_list(api_filepath, output_dir, headers, sources):
-        print(f, end=end)
+    print(*get_file_list(api_filepath, output_dir, headers, sources), sep=";", end=None)
 
 
 def scons_emit_files(target, source, env):
@@ -161,7 +164,7 @@ def generate_bindings(api_filepath, use_template_get_node, bits="64", precision=
 
     target_dir = Path(output_dir) / "gen"
 
-    with open(api_filepath) as api_file:
+    with open(api_filepath, encoding="utf-8") as api_file:
         api = json.load(api_file)
 
     shutil.rmtree(target_dir, ignore_errors=True)
@@ -171,6 +174,7 @@ def generate_bindings(api_filepath, use_template_get_node, bits="64", precision=
     print("Built-in type config: " + real_t + "_" + bits)
 
     generate_global_constants(api, target_dir)
+    generate_version_header(api, target_dir)
     generate_global_constant_binds(api, target_dir)
     generate_builtin_bindings(api, target_dir, real_t + "_" + bits)
     generate_engine_classes_bindings(api, target_dir, use_template_get_node)
@@ -217,7 +221,7 @@ def generate_builtin_bindings(api, output_dir, build_config):
 
     # Create a file for Variant size, since that class isn't generated.
     variant_size_filename = include_gen_folder / "variant_size.hpp"
-    with variant_size_filename.open("+w") as variant_size_file:
+    with variant_size_filename.open("+w", encoding="utf-8") as variant_size_file:
         variant_size_source = []
         add_header("variant_size.hpp", variant_size_source)
 
@@ -293,15 +297,15 @@ def generate_builtin_bindings(api, output_dir, build_config):
         fully_used_classes = list(fully_used_classes)
         fully_used_classes.sort()
 
-        with header_filename.open("w+") as header_file:
+        with header_filename.open("w+", encoding="utf-8") as header_file:
             header_file.write(generate_builtin_class_header(builtin_api, size, used_classes, fully_used_classes))
 
-        with source_filename.open("w+") as source_file:
+        with source_filename.open("w+", encoding="utf-8") as source_file:
             source_file.write(generate_builtin_class_source(builtin_api, size, used_classes, fully_used_classes))
 
     # Create a header with all builtin types for convenience.
     builtin_header_filename = include_gen_folder / "builtin_types.hpp"
-    with builtin_header_filename.open("w+") as builtin_header_file:
+    with builtin_header_filename.open("w+", encoding="utf-8") as builtin_header_file:
         builtin_header = []
         add_header("builtin_types.hpp", builtin_header)
 
@@ -321,7 +325,7 @@ def generate_builtin_bindings(api, output_dir, build_config):
 
     # Create a header with bindings for builtin types.
     builtin_binds_filename = include_gen_folder / "builtin_binds.hpp"
-    with builtin_binds_filename.open("w+") as builtin_binds_file:
+    with builtin_binds_filename.open("w+", encoding="utf-8") as builtin_binds_file:
         builtin_binds = []
         add_header("builtin_binds.hpp", builtin_binds)
 
@@ -342,6 +346,40 @@ def generate_builtin_bindings(api, output_dir, build_config):
 
         builtin_binds_file.write("\n".join(builtin_binds))
 
+    # Create a header to implement all builtin class vararg methods and be included in "variant.hpp".
+    builtin_vararg_methods_header = include_gen_folder / "builtin_vararg_methods.hpp"
+    builtin_vararg_methods_header.open("w+").write(
+        generate_builtin_class_vararg_method_implements_header(api["builtin_classes"])
+    )
+
+
+def generate_builtin_class_vararg_method_implements_header(builtin_classes):
+    result = []
+
+    add_header("builtin_vararg_methods.hpp", result)
+
+    header_guard = "GODOT_CPP_BUILTIN_VARARG_METHODS_HPP"
+    result.append(f"#ifndef {header_guard}")
+    result.append(f"#define {header_guard}")
+    result.append("")
+    for builtin_api in builtin_classes:
+        if not "methods" in builtin_api:
+            continue
+        class_name = builtin_api["name"]
+        for method in builtin_api["methods"]:
+            if not method["is_vararg"]:
+                continue
+
+            result += make_varargs_template(
+                method, "is_static" in method and method["is_static"], class_name, False, False, True
+            )
+            result.append("")
+
+    result.append("")
+    result.append(f"#endif // ! {header_guard}")
+
+    return "\n".join(result)
+
 
 def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_classes):
     result = []
@@ -364,6 +402,7 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
     if class_name == "String":
         result.append("#include <godot_cpp/variant/char_string.hpp>")
         result.append("#include <godot_cpp/variant/char_utils.hpp>")
+        result.append("#include <godot_cpp/classes/global_constants.hpp>")
 
     if class_name == "PackedStringArray":
         result.append("#include <godot_cpp/variant/string.hpp>")
@@ -377,6 +416,9 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
     if class_name == "Array":
         result.append("#include <godot_cpp/variant/array_helpers.hpp>")
 
+    if class_name == "Callable":
+        result.append("#include <godot_cpp/variant/callable_custom.hpp>")
+
     for include in fully_used_classes:
         if include == "TypedArray":
             result.append("#include <godot_cpp/variant/typed_array.hpp>")
@@ -479,10 +521,16 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
 
     # Special cases.
     if class_name == "String" or class_name == "StringName" or class_name == "NodePath":
-        result.append(f"\t{class_name}(const char *from);")
+        if class_name == "StringName":
+            result.append(f"\t{class_name}(const char *from, bool p_static = false);")
+        else:
+            result.append(f"\t{class_name}(const char *from);")
         result.append(f"\t{class_name}(const wchar_t *from);")
         result.append(f"\t{class_name}(const char16_t *from);")
         result.append(f"\t{class_name}(const char32_t *from);")
+    if class_name == "Callable":
+        result.append("\tCallable(CallableCustom *p_custom);")
+        result.append("\tCallableCustom *get_custom() const;")
 
     if "constants" in builtin_api:
         axis_constants_count = 0
@@ -550,6 +598,7 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
         result.append("\tChar32String utf32() const;")
         result.append("\tCharWideString wide_string() const;")
         result.append("\tstatic String num_real(double p_num, bool p_trailing = true);")
+        result.append("\tError resize(int p_size);")
 
     if "members" in builtin_api:
         for member in builtin_api["members"]:
@@ -772,12 +821,12 @@ def generate_builtin_class_source(builtin_api, size, used_classes, fully_used_cl
     if "constructors" in builtin_api:
         for constructor in builtin_api["constructors"]:
             result.append(
-                f'\t_method_bindings.constructor_{constructor["index"]} = internal::gde_interface->variant_get_ptr_constructor({enum_type_name}, {constructor["index"]});'
+                f'\t_method_bindings.constructor_{constructor["index"]} = internal::gdextension_interface_variant_get_ptr_constructor({enum_type_name}, {constructor["index"]});'
             )
 
     if builtin_api["has_destructor"]:
         result.append(
-            f"\t_method_bindings.destructor = internal::gde_interface->variant_get_ptr_destructor({enum_type_name});"
+            f"\t_method_bindings.destructor = internal::gdextension_interface_variant_get_ptr_destructor({enum_type_name});"
         )
 
     result.append("}")
@@ -789,43 +838,43 @@ def generate_builtin_class_source(builtin_api, size, used_classes, fully_used_cl
         result.append("\tString::_init_bindings_constructors_destructor();")
     result.append(f"\t{class_name}::_init_bindings_constructors_destructor();")
 
-    result.append("\tStringName __name;")
+    result.append("\tStringName _gde_name;")
 
     if "methods" in builtin_api:
         for method in builtin_api["methods"]:
             # TODO: Add error check for hash mismatch.
-            result.append(f'\t__name = StringName("{method["name"]}");')
+            result.append(f'\t_gde_name = StringName("{method["name"]}");')
             result.append(
-                f'\t_method_bindings.method_{method["name"]} = internal::gde_interface->variant_get_ptr_builtin_method({enum_type_name}, __name._native_ptr(), {method["hash"]});'
+                f'\t_method_bindings.method_{method["name"]} = internal::gdextension_interface_variant_get_ptr_builtin_method({enum_type_name}, _gde_name._native_ptr(), {method["hash"]});'
             )
 
     if "members" in builtin_api:
         for member in builtin_api["members"]:
-            result.append(f'\t__name = StringName("{member["name"]}");')
+            result.append(f'\t_gde_name = StringName("{member["name"]}");')
             result.append(
-                f'\t_method_bindings.member_{member["name"]}_setter = internal::gde_interface->variant_get_ptr_setter({enum_type_name}, __name._native_ptr());'
+                f'\t_method_bindings.member_{member["name"]}_setter = internal::gdextension_interface_variant_get_ptr_setter({enum_type_name}, _gde_name._native_ptr());'
             )
             result.append(
-                f'\t_method_bindings.member_{member["name"]}_getter = internal::gde_interface->variant_get_ptr_getter({enum_type_name}, __name._native_ptr());'
+                f'\t_method_bindings.member_{member["name"]}_getter = internal::gdextension_interface_variant_get_ptr_getter({enum_type_name}, _gde_name._native_ptr());'
             )
 
     if "indexing_return_type" in builtin_api:
         result.append(
-            f"\t_method_bindings.indexed_setter = internal::gde_interface->variant_get_ptr_indexed_setter({enum_type_name});"
+            f"\t_method_bindings.indexed_setter = internal::gdextension_interface_variant_get_ptr_indexed_setter({enum_type_name});"
         )
         result.append(
-            f"\t_method_bindings.indexed_getter = internal::gde_interface->variant_get_ptr_indexed_getter({enum_type_name});"
+            f"\t_method_bindings.indexed_getter = internal::gdextension_interface_variant_get_ptr_indexed_getter({enum_type_name});"
         )
 
     if "is_keyed" in builtin_api and builtin_api["is_keyed"]:
         result.append(
-            f"\t_method_bindings.keyed_setter = internal::gde_interface->variant_get_ptr_keyed_setter({enum_type_name});"
+            f"\t_method_bindings.keyed_setter = internal::gdextension_interface_variant_get_ptr_keyed_setter({enum_type_name});"
         )
         result.append(
-            f"\t_method_bindings.keyed_getter = internal::gde_interface->variant_get_ptr_keyed_getter({enum_type_name});"
+            f"\t_method_bindings.keyed_getter = internal::gdextension_interface_variant_get_ptr_keyed_getter({enum_type_name});"
         )
         result.append(
-            f"\t_method_bindings.keyed_checker = internal::gde_interface->variant_get_ptr_keyed_checker({enum_type_name});"
+            f"\t_method_bindings.keyed_checker = internal::gdextension_interface_variant_get_ptr_keyed_checker({enum_type_name});"
         )
 
     if "operators" in builtin_api:
@@ -838,11 +887,11 @@ def generate_builtin_class_source(builtin_api, size, used_classes, fully_used_cl
                         f"GDEXTENSION_VARIANT_TYPE_{camel_to_snake(operator['right_type']).upper()}"
                     )
                 result.append(
-                    f'\t_method_bindings.operator_{get_operator_id_name(operator["name"])}_{operator["right_type"]} = internal::gde_interface->variant_get_ptr_operator_evaluator(GDEXTENSION_VARIANT_OP_{get_operator_id_name(operator["name"]).upper()}, {enum_type_name}, {right_type_variant_type});'
+                    f'\t_method_bindings.operator_{get_operator_id_name(operator["name"])}_{operator["right_type"]} = internal::gdextension_interface_variant_get_ptr_operator_evaluator(GDEXTENSION_VARIANT_OP_{get_operator_id_name(operator["name"]).upper()}, {enum_type_name}, {right_type_variant_type});'
                 )
             else:
                 result.append(
-                    f'\t_method_bindings.operator_{get_operator_id_name(operator["name"])} = internal::gde_interface->variant_get_ptr_operator_evaluator(GDEXTENSION_VARIANT_OP_{get_operator_id_name(operator["name"]).upper()}, {enum_type_name}, GDEXTENSION_VARIANT_TYPE_NIL);'
+                    f'\t_method_bindings.operator_{get_operator_id_name(operator["name"])} = internal::gdextension_interface_variant_get_ptr_operator_evaluator(GDEXTENSION_VARIANT_OP_{get_operator_id_name(operator["name"]).upper()}, {enum_type_name}, GDEXTENSION_VARIANT_TYPE_NIL);'
                 )
 
     result.append("}")
@@ -1034,21 +1083,25 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
 
     # First create map of classes and singletons.
     for class_api in api["classes"]:
-        # TODO: Properly setup this singleton since it conflicts with ClassDB in the bindings.
+        # Generate code for the ClassDB singleton under a different name.
         if class_api["name"] == "ClassDB":
-            continue
+            class_api["name"] = "ClassDBSingleton"
+            class_api["alias_for"] = "ClassDB"
         engine_classes[class_api["name"]] = class_api["is_refcounted"]
     for native_struct in api["native_structures"]:
+        if native_struct["name"] == "ObjectID":
+            continue
         engine_classes[native_struct["name"]] = False
         native_structures.append(native_struct["name"])
 
     for singleton in api["singletons"]:
+        # Generate code for the ClassDB singleton under a different name.
+        if singleton["name"] == "ClassDB":
+            singleton["name"] = "ClassDBSingleton"
+            singleton["alias_for"] = "ClassDB"
         singletons.append(singleton["name"])
 
     for class_api in api["classes"]:
-        # TODO: Properly setup this singleton since it conflicts with ClassDB in the bindings.
-        if class_api["name"] == "ClassDB":
-            continue
         # Check used classes for header include.
         used_classes = set()
         fully_used_classes = set()
@@ -1138,6 +1191,12 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         else:
             fully_used_classes.add("Wrapped")
 
+        # In order to ensure that PtrToArg specializations for native structs are
+        # always used, let's move any of them into 'fully_used_classes'.
+        for type_name in used_classes:
+            if is_struct_type(type_name) and not is_included_struct_type(type_name):
+                fully_used_classes.add(type_name)
+
         for type_name in fully_used_classes:
             if type_name in used_classes:
                 used_classes.remove(type_name)
@@ -1147,18 +1206,20 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         fully_used_classes = list(fully_used_classes)
         fully_used_classes.sort()
 
-        with header_filename.open("w+") as header_file:
+        with header_filename.open("w+", encoding="utf-8") as header_file:
             header_file.write(
                 generate_engine_class_header(class_api, used_classes, fully_used_classes, use_template_get_node)
             )
 
-        with source_filename.open("w+") as source_file:
+        with source_filename.open("w+", encoding="utf-8") as source_file:
             source_file.write(
                 generate_engine_class_source(class_api, used_classes, fully_used_classes, use_template_get_node)
             )
 
     for native_struct in api["native_structures"]:
         struct_name = native_struct["name"]
+        if struct_name == "ObjectID":
+            continue
         snake_struct_name = camel_to_snake(struct_name)
 
         header_filename = include_gen_folder / (snake_struct_name + ".hpp")
@@ -1183,8 +1244,9 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         for included in used_classes:
             result.append(f"#include <godot_cpp/{get_include_path(included)}>")
 
-        if len(used_classes) > 0:
-            result.append("")
+        if len(used_classes) == 0:
+            result.append("#include <godot_cpp/core/method_ptrcall.hpp>")
+        result.append("")
 
         result.append("namespace godot {")
         result.append("")
@@ -1202,7 +1264,7 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         result.append("")
         result.append(f"#endif // ! {header_guard}")
 
-        with header_filename.open("w+") as header_file:
+        with header_filename.open("w+", encoding="utf-8") as header_file:
             header_file.write("\n".join(result))
 
 
@@ -1229,10 +1291,13 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
         else:
             result.append(f"#include <godot_cpp/{get_include_path(included)}>")
 
+    if class_name == "EditorPlugin":
+        result.append("#include <godot_cpp/classes/editor_plugin_registration.hpp>")
+
     if len(fully_used_classes) > 0:
         result.append("")
 
-    if class_name != "Object":
+    if class_name != "Object" and class_name != "ClassDBSingleton":
         result.append("#include <godot_cpp/core/class_db.hpp>")
         result.append("")
         result.append("#include <type_traits>")
@@ -1253,7 +1318,10 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
     inherits = class_api["inherits"] if "inherits" in class_api else "Wrapped"
     result.append(f"class {class_name} : public {inherits} {{")
 
-    result.append(f"\tGDEXTENSION_CLASS({class_name}, {inherits})")
+    if "alias_for" in class_api:
+        result.append(f"\tGDEXTENSION_CLASS_ALIAS({class_name}, {class_api['alias_for']}, {inherits})")
+    else:
+        result.append(f"\tGDEXTENSION_CLASS({class_name}, {inherits})")
     result.append("")
 
     result.append("public:")
@@ -1261,7 +1329,11 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
 
     if "enums" in class_api:
         for enum_api in class_api["enums"]:
-            result.append(f'\tenum {enum_api["name"]} {{')
+            if enum_api["is_bitfield"]:
+                result.append(f'\tenum {enum_api["name"]} : uint64_t {{')
+            else:
+                result.append(f'\tenum {enum_api["name"]} {{')
+
             for value in enum_api["values"]:
                 result.append(f'\t\t{value["name"]} = {value["value"]},')
             result.append("\t};")
@@ -1387,6 +1459,51 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
                 result.append(f'VARIANT_ENUM_CAST({class_name}::{enum_api["name"]});')
         result.append("")
 
+    if class_name == "ClassDBSingleton":
+        result.append("#define CLASSDB_SINGLETON_FORWARD_METHODS \\")
+        for method in class_api["methods"]:
+            # ClassDBSingleton shouldn't have any static or vararg methods, but if some appear later, lets skip them.
+            if vararg:
+                continue
+            if "is_static" in method and method["is_static"]:
+                continue
+
+            method_signature = "\tstatic "
+            if "return_type" in method:
+                method_signature += f'{correct_type(method["return_type"])} '
+            elif "return_value" in method:
+                method_signature += (
+                    correct_type(method["return_value"]["type"], method["return_value"].get("meta", None)) + " "
+                )
+            else:
+                method_signature += "void "
+
+            method_signature += f'{method["name"]}('
+
+            method_arguments = []
+            if "arguments" in method:
+                method_arguments = method["arguments"]
+
+            method_signature += make_function_parameters(
+                method_arguments, include_default=True, for_builtin=True, is_vararg=False
+            )
+
+            method_signature += ") { \\"
+
+            result.append(method_signature)
+
+            method_body = "\t\t"
+            if "return_type" in method or "return_value" in method:
+                method_body += "return "
+            method_body += f'ClassDBSingleton::get_singleton()->{method["name"]}('
+            method_body += ", ".join(map(lambda x: escape_identifier(x["name"]), method_arguments))
+            method_body += "); \\"
+
+            result.append(method_body)
+            result.append("\t} \\")
+        result.append("\t;")
+        result.append("")
+
     result.append(f"#endif // ! {header_guard}")
 
     return "\n".join(result)
@@ -1419,16 +1536,22 @@ def generate_engine_class_source(class_api, used_classes, fully_used_classes, us
 
     if is_singleton:
         result.append(f"{class_name} *{class_name}::get_singleton() {{")
-        result.append(f"\tconst StringName __class_name = {class_name}::get_class_static();")
+        # We assume multi-threaded access is OK because each assignment will assign the same value every time
+        result.append(f"\tstatic {class_name} *singleton = nullptr;")
+        result.append("\tif (unlikely(singleton == nullptr)) {")
         result.append(
-            "\tstatic GDExtensionObjectPtr singleton_obj = internal::gde_interface->global_get_singleton(__class_name._native_ptr());"
+            f"\t\tGDExtensionObjectPtr singleton_obj = internal::gdextension_interface_global_get_singleton({class_name}::get_class_static()._native_ptr());"
         )
         result.append("#ifdef DEBUG_ENABLED")
-        result.append("\tERR_FAIL_COND_V(singleton_obj == nullptr, nullptr);")
+        result.append("\t\tERR_FAIL_NULL_V(singleton_obj, nullptr);")
         result.append("#endif // DEBUG_ENABLED")
         result.append(
-            f"\tstatic {class_name} *singleton = reinterpret_cast<{class_name} *>(internal::gde_interface->object_get_instance_binding(singleton_obj, internal::token, &{class_name}::___binding_callbacks));"
+            f"\t\tsingleton = reinterpret_cast<{class_name} *>(internal::gdextension_interface_object_get_instance_binding(singleton_obj, internal::token, &{class_name}::_gde_binding_callbacks));"
         )
+        result.append("#ifdef DEBUG_ENABLED")
+        result.append("\t\tERR_FAIL_NULL_V(singleton, nullptr);")
+        result.append("#endif // DEBUG_ENABLED")
+        result.append("\t}")
         result.append("\treturn singleton;")
         result.append("}")
         result.append("")
@@ -1446,20 +1569,18 @@ def generate_engine_class_source(class_api, used_classes, fully_used_classes, us
             result.append(method_signature + " {")
 
             # Method body.
-            result.append(f"\tconst StringName __class_name = {class_name}::get_class_static();")
-            result.append(f'\tconst StringName __method_name = "{method["name"]}";')
             result.append(
-                f'\tstatic GDExtensionMethodBindPtr ___method_bind = internal::gde_interface->classdb_get_method_bind(__class_name._native_ptr(), __method_name._native_ptr(), {method["hash"]});'
+                f'\tstatic GDExtensionMethodBindPtr _gde_method_bind = internal::gdextension_interface_classdb_get_method_bind({class_name}::get_class_static()._native_ptr(), StringName("{method["name"]}")._native_ptr(), {method["hash"]});'
             )
             method_call = "\t"
             has_return = "return_value" in method and method["return_value"]["type"] != "void"
 
             if has_return:
                 result.append(
-                    f'\tCHECK_METHOD_BIND_RET(___method_bind, {get_default_value_for_type(method["return_value"]["type"])});'
+                    f'\tCHECK_METHOD_BIND_RET(_gde_method_bind, {get_default_value_for_type(method["return_value"]["type"])});'
                 )
             else:
-                result.append("\tCHECK_METHOD_BIND(___method_bind);")
+                result.append("\tCHECK_METHOD_BIND(_gde_method_bind);")
 
             is_ref = False
             if not vararg:
@@ -1468,34 +1589,34 @@ def generate_engine_class_source(class_api, used_classes, fully_used_classes, us
                     meta_type = method["return_value"]["meta"] if "meta" in method["return_value"] else None
                     if is_enum(return_type):
                         if method["is_static"]:
-                            method_call += f"return ({get_gdextension_type(correct_type(return_type, meta_type))})internal::_call_native_mb_ret<int64_t>(___method_bind, nullptr"
+                            method_call += f"return ({get_gdextension_type(correct_type(return_type, meta_type))})internal::_call_native_mb_ret<int64_t>(_gde_method_bind, nullptr"
                         else:
-                            method_call += f"return ({get_gdextension_type(correct_type(return_type, meta_type))})internal::_call_native_mb_ret<int64_t>(___method_bind, _owner"
+                            method_call += f"return ({get_gdextension_type(correct_type(return_type, meta_type))})internal::_call_native_mb_ret<int64_t>(_gde_method_bind, _owner"
                     elif is_pod_type(return_type) or is_variant(return_type):
                         if method["is_static"]:
-                            method_call += f"return internal::_call_native_mb_ret<{get_gdextension_type(correct_type(return_type, meta_type))}>(___method_bind, nullptr"
+                            method_call += f"return internal::_call_native_mb_ret<{get_gdextension_type(correct_type(return_type, meta_type))}>(_gde_method_bind, nullptr"
                         else:
-                            method_call += f"return internal::_call_native_mb_ret<{get_gdextension_type(correct_type(return_type, meta_type))}>(___method_bind, _owner"
+                            method_call += f"return internal::_call_native_mb_ret<{get_gdextension_type(correct_type(return_type, meta_type))}>(_gde_method_bind, _owner"
                     elif is_refcounted(return_type):
                         if method["is_static"]:
-                            method_call += f"return Ref<{return_type}>::___internal_constructor(internal::_call_native_mb_ret_obj<{return_type}>(___method_bind, nullptr"
+                            method_call += f"return Ref<{return_type}>::_gde_internal_constructor(internal::_call_native_mb_ret_obj<{return_type}>(_gde_method_bind, nullptr"
                         else:
-                            method_call += f"return Ref<{return_type}>::___internal_constructor(internal::_call_native_mb_ret_obj<{return_type}>(___method_bind, _owner"
+                            method_call += f"return Ref<{return_type}>::_gde_internal_constructor(internal::_call_native_mb_ret_obj<{return_type}>(_gde_method_bind, _owner"
                         is_ref = True
                     else:
                         if method["is_static"]:
                             method_call += (
-                                f"return internal::_call_native_mb_ret_obj<{return_type}>(___method_bind, nullptr"
+                                f"return internal::_call_native_mb_ret_obj<{return_type}>(_gde_method_bind, nullptr"
                             )
                         else:
                             method_call += (
-                                f"return internal::_call_native_mb_ret_obj<{return_type}>(___method_bind, _owner"
+                                f"return internal::_call_native_mb_ret_obj<{return_type}>(_gde_method_bind, _owner"
                             )
                 else:
                     if method["is_static"]:
-                        method_call += "internal::_call_native_mb_no_ret(___method_bind, nullptr"
+                        method_call += "internal::_call_native_mb_no_ret(_gde_method_bind, nullptr"
                     else:
-                        method_call += "internal::_call_native_mb_no_ret(___method_bind, _owner"
+                        method_call += "internal::_call_native_mb_no_ret(_gde_method_bind, _owner"
 
                 if "arguments" in method:
                     method_call += ", "
@@ -1512,7 +1633,7 @@ def generate_engine_class_source(class_api, used_classes, fully_used_classes, us
             else:  # vararg.
                 result.append("\tGDExtensionCallError error;")
                 result.append("\tVariant ret;")
-                method_call += "internal::gde_interface->object_method_bind_call(___method_bind, _owner, reinterpret_cast<GDExtensionConstVariantPtr *>(args), arg_count, &ret, &error"
+                method_call += "internal::gdextension_interface_object_method_bind_call(_gde_method_bind, _owner, reinterpret_cast<GDExtensionConstVariantPtr *>(args), arg_count, &ret, &error"
 
             if is_ref:
                 method_call += ")"  # Close Ref<> constructor.
@@ -1569,6 +1690,8 @@ def generate_global_constants(api, output_dir):
     header.append(f"#ifndef {header_guard}")
     header.append(f"#define {header_guard}")
     header.append("")
+    header.append("#include <cstdint>")
+    header.append("")
     header.append("namespace godot {")
     header.append("")
 
@@ -1581,7 +1704,11 @@ def generate_global_constants(api, output_dir):
         if enum_def["name"].startswith("Variant."):
             continue
 
-        header.append(f'\tenum {enum_def["name"]} {{')
+        if enum_def["is_bitfield"]:
+            header.append(f'\tenum {enum_def["name"]} : uint64_t {{')
+        else:
+            header.append(f'\tenum {enum_def["name"]} {{')
+
         for value in enum_def["values"]:
             header.append(f'\t\t{value["name"]} = {value["value"]},')
         header.append("\t};")
@@ -1592,7 +1719,36 @@ def generate_global_constants(api, output_dir):
     header.append("")
     header.append(f"#endif // ! {header_guard}")
 
-    with header_filename.open("w+") as header_file:
+    with header_filename.open("w+", encoding="utf-8") as header_file:
+        header_file.write("\n".join(header))
+
+
+def generate_version_header(api, output_dir):
+    header = []
+    header_filename = "version.hpp"
+    add_header(header_filename, header)
+
+    include_gen_folder = Path(output_dir) / "include" / "godot_cpp" / "core"
+    include_gen_folder.mkdir(parents=True, exist_ok=True)
+
+    header_file_path = include_gen_folder / header_filename
+
+    header_guard = "GODOT_CPP_VERSION_HPP"
+    header.append(f"#ifndef {header_guard}")
+    header.append(f"#define {header_guard}")
+    header.append("")
+
+    header.append(f"#define GODOT_VERSION_MAJOR {api['header']['version_major']}")
+    header.append(f"#define GODOT_VERSION_MINOR {api['header']['version_minor']}")
+    header.append(f"#define GODOT_VERSION_PATCH {api['header']['version_patch']}")
+    header.append(f"#define GODOT_VERSION_STATUS \"{api['header']['version_status']}\"")
+    header.append(f"#define GODOT_VERSION_BUILD \"{api['header']['version_build']}\"")
+
+    header.append("")
+    header.append(f"#endif // {header_guard}")
+    header.append("")
+
+    with header_file_path.open("w+", encoding="utf-8") as header_file:
         header_file.write("\n".join(header))
 
 
@@ -1633,7 +1789,7 @@ def generate_global_constant_binds(api, output_dir):
 
     header.append(f"#endif // ! {header_guard}")
 
-    with header_filename.open("w+") as header_file:
+    with header_filename.open("w+", encoding="utf-8") as header_file:
         header_file.write("\n".join(header))
 
 
@@ -1682,7 +1838,7 @@ def generate_utility_functions(api, output_dir):
     header.append("")
     header.append(f"#endif // ! {header_guard}")
 
-    with header_filename.open("w+") as header_file:
+    with header_filename.open("w+", encoding="utf-8") as header_file:
         header_file.write("\n".join(header))
 
     # Generate source.
@@ -1707,28 +1863,27 @@ def generate_utility_functions(api, output_dir):
 
         # Function body.
 
-        source.append(f'\tconst StringName __function_name = "{function["name"]}";')
         source.append(
-            f'\tstatic GDExtensionPtrUtilityFunction ___function = internal::gde_interface->variant_get_ptr_utility_function(__function_name._native_ptr(), {function["hash"]});'
+            f'\tstatic GDExtensionPtrUtilityFunction _gde_function = internal::gdextension_interface_variant_get_ptr_utility_function(StringName("{function["name"]}")._native_ptr(), {function["hash"]});'
         )
         has_return = "return_type" in function and function["return_type"] != "void"
         if has_return:
             source.append(
-                f'\tCHECK_METHOD_BIND_RET(___function, {get_default_value_for_type(function["return_type"])});'
+                f'\tCHECK_METHOD_BIND_RET(_gde_function, {get_default_value_for_type(function["return_type"])});'
             )
         else:
-            source.append("\tCHECK_METHOD_BIND(___function);")
+            source.append("\tCHECK_METHOD_BIND(_gde_function);")
 
         function_call = "\t"
         if not vararg:
             if has_return:
                 function_call += "return "
                 if function["return_type"] == "Object":
-                    function_call += "internal::_call_utility_ret_obj(___function"
+                    function_call += "internal::_call_utility_ret_obj(_gde_function"
                 else:
-                    function_call += f'internal::_call_utility_ret<{get_gdextension_type(correct_type(function["return_type"]))}>(___function'
+                    function_call += f'internal::_call_utility_ret<{get_gdextension_type(correct_type(function["return_type"]))}>(_gde_function'
             else:
-                function_call += "internal::_call_utility_no_ret(___function"
+                function_call += "internal::_call_utility_no_ret(_gde_function"
 
             if "arguments" in function:
                 function_call += ", "
@@ -1743,8 +1898,11 @@ def generate_utility_functions(api, output_dir):
                     arguments.append(arg_name)
                 function_call += ", ".join(arguments)
         else:
-            source.append("\tVariant ret;")
-            function_call += "___function(&ret, reinterpret_cast<GDExtensionConstVariantPtr *>(args), arg_count"
+            if has_return:
+                source.append(f'\t{get_gdextension_type(correct_type(function["return_type"]))} ret;')
+            else:
+                source.append("\tVariant ret;")
+            function_call += "_gde_function(&ret, reinterpret_cast<GDExtensionConstVariantPtr *>(args), arg_count"
 
         function_call += ");"
         source.append(function_call)
@@ -1757,7 +1915,7 @@ def generate_utility_functions(api, output_dir):
 
     source.append("} // namespace godot")
 
-    with source_filename.open("w+") as source_file:
+    with source_filename.open("w+", encoding="utf-8") as source_file:
         source_file.write("\n".join(source))
 
 
@@ -1831,7 +1989,7 @@ def get_encoded_arg(arg_name, type_name, type_meta):
     elif is_engine_class(type_name):
         # `{name}` is a C++ wrapper, it contains a field which is the object's pointer Godot expects.
         # We have to check `nullptr` because when the caller sends `nullptr`, the wrapper itself will be null.
-        name = f"({name} != nullptr ? {name}->_owner : nullptr)"
+        name = f"({name} != nullptr ? &{name}->_owner : nullptr)"
     else:
         name = f"&{name}"
 
@@ -1900,10 +2058,22 @@ def make_signature(
     return function_signature
 
 
-def make_varargs_template(function_data, static=False):
+def make_varargs_template(
+    function_data,
+    static=False,
+    class_befor_signature="",
+    with_public_declare=True,
+    with_indent=True,
+    for_builtin_classes=False,
+):
     result = []
 
-    function_signature = "\tpublic: template<class... Args> "
+    function_signature = ""
+
+    if with_public_declare:
+        function_signature = "public: "
+
+    function_signature += "template<class... Args> "
 
     if static:
         function_signature += "static "
@@ -1924,6 +2094,8 @@ def make_varargs_template(function_data, static=False):
     if not function_signature.endswith("*"):
         function_signature += " "
 
+    if len(class_befor_signature) > 0:
+        function_signature += class_befor_signature + "::"
     function_signature += f'{escape_identifier(function_data["name"])}'
 
     method_arguments = []
@@ -1944,7 +2116,7 @@ def make_varargs_template(function_data, static=False):
     function_signature += " {"
     result.append(function_signature)
 
-    args_array = f"\t\tstd::array<Variant, {len(method_arguments)} + sizeof...(Args)> variant_args {{ "
+    args_array = f"\tstd::array<Variant, {len(method_arguments)} + sizeof...(Args)> variant_args {{ "
     for argument in method_arguments:
         if argument["type"] == "Variant":
             args_array += argument["name"]
@@ -1954,20 +2126,43 @@ def make_varargs_template(function_data, static=False):
 
     args_array += "Variant(args)... };"
     result.append(args_array)
-    result.append(f"\t\tstd::array<const Variant *, {len(method_arguments)} + sizeof...(Args)> call_args;")
-    result.append("\t\tfor(size_t i = 0; i < variant_args.size(); i++) {")
-    result.append("\t\t\tcall_args[i] = &variant_args[i];")
-    result.append("\t\t}")
-
-    call_line = "\t\t"
-
-    if return_type != "void":
-        call_line += "return "
-
-    call_line += f'{escape_identifier(function_data["name"])}_internal(call_args.data(), variant_args.size());'
-    result.append(call_line)
+    result.append(f"\tstd::array<const Variant *, {len(method_arguments)} + sizeof...(Args)> call_args;")
+    result.append("\tfor(size_t i = 0; i < variant_args.size(); i++) {")
+    result.append("\t\tcall_args[i] = &variant_args[i];")
     result.append("\t}")
 
+    call_line = "\t"
+
+    if not for_builtin_classes:
+        if return_type != "void":
+            call_line += "return "
+
+        call_line += f'{escape_identifier(function_data["name"])}_internal(call_args.data(), variant_args.size());'
+        result.append(call_line)
+    else:
+        base = "(GDExtensionTypePtr)&opaque"
+        if static:
+            base = "nullptr"
+
+        ret = "nullptr"
+        if return_type != "void":
+            ret = "&ret"
+            result.append(f'\t{correct_type(function_data["return_type"])} ret;')
+
+        function_name = function_data["name"]
+        result.append(
+            f"\t_method_bindings.method_{function_name}({base}, reinterpret_cast<GDExtensionConstTypePtr *>(call_args.data()), {ret}, {len(method_arguments)} + sizeof...(Args));"
+        )
+
+        if return_type != "void":
+            result.append("\treturn ret;")
+
+    result.append("}")
+
+    if with_indent:
+        for i in range(len(result)):
+            result[i] = "\t" + result[i]
+
     return result
 
 
@@ -2216,6 +2411,7 @@ def escape_identifier(id):
         "operator": "_operator",
         "typeof": "type_of",
         "typename": "type_name",
+        "enum": "_enum",
     }
     if id in cpp_keywords_map:
         return cpp_keywords_map[id]

include/godot_cpp/classes/editor_plugin_registration.hpp

@@ -0,0 +1,62 @@
+/**************************************************************************/
+/*  editor_plugin_registration.hpp                                        */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_EDITOR_PLUGIN_REGISTRATION_HPP
+#define GODOT_EDITOR_PLUGIN_REGISTRATION_HPP
+
+#include <godot_cpp/templates/vector.hpp>
+
+namespace godot {
+
+class EditorPlugin;
+class StringName;
+
+class EditorPlugins {
+private:
+	static Vector<StringName> plugin_classes;
+
+public:
+	static void add_plugin_class(const StringName &p_class_name);
+	static void remove_plugin_class(const StringName &p_class_name);
+	static void deinitialize(GDExtensionInitializationLevel p_level);
+
+	template <class T>
+	static void add_by_type() {
+		add_plugin_class(T::get_class_static());
+	}
+	template <class T>
+	static void remove_by_type() {
+		remove_plugin_class(T::get_class_static());
+	}
+};
+
+} // namespace godot
+
+#endif // GODOT_EDITOR_PLUGIN_REGISTRATION_HPP

include/godot_cpp/classes/ref.hpp

@@ -63,7 +63,7 @@ class Ref {
 	}
 
 	void ref_pointer(T *p_ref) {
-		ERR_FAIL_COND(!p_ref);
+		ERR_FAIL_NULL(p_ref);
 
 		if (p_ref->init_ref()) {
 			reference = p_ref;
@@ -88,26 +88,15 @@ public:
 		return reference != p_r.reference;
 	}
 
-	_FORCE_INLINE_ T *operator->() {
+	_FORCE_INLINE_ T *operator*() const {
 		return reference;
 	}
 
-	_FORCE_INLINE_ T *operator*() {
+	_FORCE_INLINE_ T *operator->() const {
 		return reference;
 	}
 
-	_FORCE_INLINE_ const T *operator->() const {
-		return reference;
-	}
-
-	_FORCE_INLINE_ const T *ptr() const {
-		return reference;
-	}
-	_FORCE_INLINE_ T *ptr() {
-		return reference;
-	}
-
-	_FORCE_INLINE_ const T *operator*() const {
+	_FORCE_INLINE_ T *ptr() const {
 		return reference;
 	}
 
@@ -230,7 +219,7 @@ public:
 
 	// Used exclusively in the bindings to recreate the Ref Godot encapsulates in return values,
 	// without adding to the refcount.
-	inline static Ref<T> ___internal_constructor(Object *obj) {
+	inline static Ref<T> _gde_internal_constructor(Object *obj) {
 		Ref<T> r;
 		r.reference = (T *)obj;
 		return r;
@@ -241,10 +230,8 @@ template <class T>
 struct PtrToArg<Ref<T>> {
 	_FORCE_INLINE_ static Ref<T> convert(const void *p_ptr) {
 		GDExtensionRefPtr ref = (GDExtensionRefPtr)p_ptr;
-		ERR_FAIL_NULL_V(ref, Ref<T>());
-
-		T *obj = reinterpret_cast<T *>(godot::internal::gde_interface->object_get_instance_binding(godot::internal::gde_interface->ref_get_object(ref), godot::internal::token, &T::___binding_callbacks));
-		return Ref<T>(obj);
+		ERR_FAIL_NULL_V(p_ptr, Ref<T>());
+		return Ref<T>(reinterpret_cast<T *>(godot::internal::get_object_instance_binding(godot::internal::gdextension_interface_ref_get_object(ref))));
 	}
 
 	typedef Ref<T> EncodeT;
@@ -256,7 +243,7 @@ struct PtrToArg<Ref<T>> {
 		// This code assumes that p_ptr points to an unset Ref<T> variable on the Godot side
 		// so we only set it if we have an object to set.
 		if (p_val.is_valid()) {
-			godot::internal::gde_interface->ref_set_object(ref, p_val->_owner);
+			godot::internal::gdextension_interface_ref_set_object(ref, p_val->_owner);
 		}
 	}
 };
@@ -266,7 +253,9 @@ struct PtrToArg<const Ref<T> &> {
 	typedef Ref<T> EncodeT;
 
 	_FORCE_INLINE_ static Ref<T> convert(const void *p_ptr) {
-		return Ref<T>(reinterpret_cast<T *>(godot::internal::gde_interface->object_get_instance_binding(*reinterpret_cast<GDExtensionObjectPtr *>(const_cast<void *>(p_ptr)), godot::internal::token, &T::___binding_callbacks)));
+		GDExtensionRefPtr ref = const_cast<GDExtensionRefPtr>(p_ptr);
+		ERR_FAIL_NULL_V(p_ptr, Ref<T>());
+		return Ref<T>(reinterpret_cast<T *>(godot::internal::get_object_instance_binding(godot::internal::gdextension_interface_ref_get_object(ref))));
 	}
 };
 

include/godot_cpp/classes/wrapped.hpp

@@ -51,6 +51,15 @@ class Wrapped {
 	friend void postinitialize_handler(Wrapped *);
 
 protected:
+#ifdef HOT_RELOAD_ENABLED
+	struct RecreateInstance {
+		GDExtensionClassInstancePtr wrapper;
+		GDExtensionObjectPtr owner;
+		RecreateInstance *next;
+	};
+	inline static RecreateInstance *recreate_instance = nullptr;
+#endif
+
 	virtual const StringName *_get_extension_class_name() const; // This is needed to retrieve the class name before the godot object has its _extension and _extension_instance members assigned.
 	virtual const GDExtensionInstanceBindingCallbacks *_get_bindings_callbacks() const = 0;
 
@@ -60,20 +69,22 @@ protected:
 	void _get_property_list(List<PropertyInfo> *p_list) const {}
 	bool _property_can_revert(const StringName &p_name) const { return false; }
 	bool _property_get_revert(const StringName &p_name, Variant &r_property) const { return false; }
+	void _validate_property(PropertyInfo &p_property) const {}
 	String _to_string() const { return "[" + String(get_class_static()) + ":" + itos(get_instance_id()) + "]"; }
 
-	static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what) {}
+	static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what, GDExtensionBool p_reversed) {}
 	static GDExtensionBool set_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionConstVariantPtr p_value) { return false; }
 	static GDExtensionBool get_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { return false; }
 	static const GDExtensionPropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) { return nullptr; }
 	static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDExtensionPropertyInfo *p_list) {}
 	static GDExtensionBool property_can_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name) { return false; }
 	static GDExtensionBool property_get_revert_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionVariantPtr r_ret) { return false; }
+	static GDExtensionBool validate_property_bind(GDExtensionClassInstancePtr p_instance, GDExtensionPropertyInfo *p_property) { return false; }
 	static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) {}
 
+	// The only reason this has to be held here, is when we return results of `_get_property_list` to Godot, we pass
+	// pointers to strings in this list. They have to remain valid to pass the bridge, until the list is freed by Godot...
 	::godot::List<::godot::PropertyInfo> plist_owned;
-	GDExtensionPropertyInfo *plist = nullptr;
-	uint32_t plist_size = 0;
 
 	void _postinitialize();
 
@@ -95,9 +106,46 @@ public:
 	GodotObject *_owner = nullptr;
 };
 
+namespace internal {
+
+GDExtensionPropertyInfo *create_c_property_list(const ::godot::List<::godot::PropertyInfo> &plist_cpp, uint32_t *r_size);
+void free_c_property_list(GDExtensionPropertyInfo *plist);
+
+typedef void (*EngineClassRegistrationCallback)();
+void add_engine_class_registration_callback(EngineClassRegistrationCallback p_callback);
+void register_engine_class(const StringName &p_name, const GDExtensionInstanceBindingCallbacks *p_callbacks);
+void register_engine_classes();
+
+template <class T>
+struct EngineClassRegistration {
+	EngineClassRegistration() {
+		add_engine_class_registration_callback(&EngineClassRegistration<T>::callback);
+	}
+
+	static void callback() {
+		register_engine_class(T::get_class_static(), &T::_gde_binding_callbacks);
+	}
+};
+
+} // namespace internal
+
 } // namespace godot
 
-#define GDCLASS(m_class, m_inherits)                                                                                                                                                   \
+#ifdef HOT_RELOAD_ENABLED
+#define _GDCLASS_RECREATE(m_class, m_inherits)                                                   \
+	m_class *new_instance = (m_class *)memalloc(sizeof(m_class));                                \
+	Wrapped::RecreateInstance recreate_data = { new_instance, obj, Wrapped::recreate_instance }; \
+	Wrapped::recreate_instance = &recreate_data;                                                 \
+	memnew_placement(new_instance, m_class);                                                     \
+	return new_instance;
+#else
+#define _GDCLASS_RECREATE(m_class, m_inherits) return nullptr;
+#endif
+
+// Use this on top of your own classes.
+// Note: the trail of `***` is to keep sane diffs in PRs, because clang-format otherwise moves every `\` which makes
+// every line of the macro different
+#define GDCLASS(m_class, m_inherits) /***********************************************************************************************************************************************/ \
 private:                                                                                                                                                                               \
 	void operator=(const m_class &p_rval) {}                                                                                                                                           \
 	friend class ::godot::ClassDB;                                                                                                                                                     \
@@ -109,7 +157,7 @@ protected:
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
 	virtual const GDExtensionInstanceBindingCallbacks *_get_bindings_callbacks() const override {                                                                                      \
-		return &___binding_callbacks;                                                                                                                                                  \
+		return &_gde_binding_callbacks;                                                                                                                                                \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
 	static void (*_get_bind_methods())() {                                                                                                                                             \
@@ -132,16 +180,20 @@ protected:
 		return (void(::godot::Wrapped::*)(::godot::List<::godot::PropertyInfo> * p_list) const) & m_class::_get_property_list;                                                         \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static bool (::godot::Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) {                                                                                   \
-		return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name)) & m_class::_property_can_revert;                                                                         \
+	static bool (::godot::Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) const {                                                                             \
+		return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name) const) & m_class::_property_can_revert;                                                                   \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static bool (::godot::Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, ::godot::Variant &) {                                                               \
-		return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &)) & m_class::_property_get_revert;                                                     \
+	static bool (::godot::Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, ::godot::Variant &) const {                                                         \
+		return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &) const) & m_class::_property_get_revert;                                               \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static ::godot::String (::godot::Wrapped::*_get_to_string())() {                                                                                                                   \
-		return (::godot::String(::godot::Wrapped::*)()) & m_class::_to_string;                                                                                                         \
+	static void (::godot::Wrapped::*_get_validate_property())(::godot::PropertyInfo & p_property) const {                                                                              \
+		return (void(::godot::Wrapped::*)(::godot::PropertyInfo & p_property) const) & m_class::_validate_property;                                                                    \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static ::godot::String (::godot::Wrapped::*_get_to_string())() const {                                                                                                             \
+		return (::godot::String(::godot::Wrapped::*)() const) & m_class::_to_string;                                                                                                   \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
 	template <class T, class B>                                                                                                                                                        \
@@ -150,6 +202,8 @@ protected:
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
 public:                                                                                                                                                                                \
+	typedef m_class self_type;                                                                                                                                                         \
+                                                                                                                                                                                       \
 	static void initialize_class() {                                                                                                                                                   \
 		static bool initialized = false;                                                                                                                                               \
 		if (initialized) {                                                                                                                                                             \
@@ -177,13 +231,17 @@ public:
 		return new_object->_owner;                                                                                                                                                     \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what) {                                                                                            \
+	static GDExtensionClassInstancePtr recreate(void *data, GDExtensionObjectPtr obj) {                                                                                                \
+		_GDCLASS_RECREATE(m_class, m_inherits);                                                                                                                                        \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what, GDExtensionBool p_reversed) {                                                                \
 		if (p_instance && m_class::_get_notification()) {                                                                                                                              \
 			if (m_class::_get_notification() != m_inherits::_get_notification()) {                                                                                                     \
 				m_class *cls = reinterpret_cast<m_class *>(p_instance);                                                                                                                \
 				return cls->_notification(p_what);                                                                                                                                     \
 			}                                                                                                                                                                          \
-			m_inherits::notification_bind(p_instance, p_what);                                                                                                                         \
+			m_inherits::notification_bind(p_instance, p_what, p_reversed);                                                                                                             \
 		}                                                                                                                                                                              \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
@@ -209,40 +267,29 @@ public:
 		return false;                                                                                                                                                                  \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
+	static inline bool has_get_property_list() {                                                                                                                                       \
+		return m_class::_get_get_property_list() && m_class::_get_get_property_list() != m_inherits::_get_get_property_list();                                                         \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
 	static const GDExtensionPropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) {                                                          \
-		if (p_instance && m_class::_get_get_property_list()) {                                                                                                                         \
-			if (m_class::_get_get_property_list() != m_inherits::_get_get_property_list()) {                                                                                           \
-				m_class *cls = reinterpret_cast<m_class *>(p_instance);                                                                                                                \
-				ERR_FAIL_COND_V_MSG(!cls->plist_owned.is_empty() || cls->plist != nullptr || cls->plist_size != 0, nullptr, "Internal error, property list was not freed by engine!"); \
-				cls->_get_property_list(&cls->plist_owned);                                                                                                                            \
-				cls->plist = reinterpret_cast<GDExtensionPropertyInfo *>(memalloc(sizeof(GDExtensionPropertyInfo) * cls->plist_owned.size()));                                         \
-				cls->plist_size = 0;                                                                                                                                                   \
-				for (const ::godot::PropertyInfo &E : cls->plist_owned) {                                                                                                              \
-					cls->plist[cls->plist_size].type = static_cast<GDExtensionVariantType>(E.type);                                                                                    \
-					cls->plist[cls->plist_size].name = E.name._native_ptr();                                                                                                           \
-					cls->plist[cls->plist_size].hint = E.hint;                                                                                                                         \
-					cls->plist[cls->plist_size].hint_string = E.hint_string._native_ptr();                                                                                             \
-					cls->plist[cls->plist_size].class_name = E.class_name._native_ptr();                                                                                               \
-					cls->plist[cls->plist_size].usage = E.usage;                                                                                                                       \
-					cls->plist_size++;                                                                                                                                                 \
-				}                                                                                                                                                                      \
-				if (r_count)                                                                                                                                                           \
-					*r_count = cls->plist_size;                                                                                                                                        \
-				return cls->plist;                                                                                                                                                     \
-			}                                                                                                                                                                          \
-			return m_inherits::get_property_list_bind(p_instance, r_count);                                                                                                            \
+		if (!p_instance) {                                                                                                                                                             \
+			if (r_count)                                                                                                                                                               \
+				*r_count = 0;                                                                                                                                                          \
+			return nullptr;                                                                                                                                                            \
 		}                                                                                                                                                                              \
-		return nullptr;                                                                                                                                                                \
+		m_class *cls = reinterpret_cast<m_class *>(p_instance);                                                                                                                        \
+		::godot::List<::godot::PropertyInfo> &plist_cpp = cls->plist_owned;                                                                                                            \
+		ERR_FAIL_COND_V_MSG(!plist_cpp.is_empty(), nullptr, "Internal error, property list was not freed by engine!");                                                                 \
+		cls->_get_property_list(&plist_cpp);                                                                                                                                           \
+		return ::godot::internal::create_c_property_list(plist_cpp, r_count);                                                                                                          \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
 	static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDExtensionPropertyInfo *p_list) {                                                               \
 		if (p_instance) {                                                                                                                                                              \
 			m_class *cls = reinterpret_cast<m_class *>(p_instance);                                                                                                                    \
-			ERR_FAIL_COND_MSG(cls->plist == nullptr, "Internal error, property list double free!");                                                                                    \
-			memfree(cls->plist);                                                                                                                                                       \
-			cls->plist = nullptr;                                                                                                                                                      \
-			cls->plist_size = 0;                                                                                                                                                       \
 			cls->plist_owned.clear();                                                                                                                                                  \
+			/* TODO `GDExtensionClassFreePropertyList` is ill-defined, we need a non-const pointer to free this. */                                                                    \
+			::godot::internal::free_c_property_list(const_cast<GDExtensionPropertyInfo *>(p_list));                                                                                    \
 		}                                                                                                                                                                              \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
@@ -268,6 +315,21 @@ public:
 		return false;                                                                                                                                                                  \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
+	static GDExtensionBool validate_property_bind(GDExtensionClassInstancePtr p_instance, GDExtensionPropertyInfo *p_property) {                                                       \
+		bool ret = false;                                                                                                                                                              \
+		if (p_instance && m_class::_get_validate_property()) {                                                                                                                         \
+			ret = m_inherits::validate_property_bind(p_instance, p_property);                                                                                                          \
+			if (m_class::_get_validate_property() != m_inherits::_get_validate_property()) {                                                                                           \
+				m_class *cls = reinterpret_cast<m_class *>(p_instance);                                                                                                                \
+				::godot::PropertyInfo info(p_property);                                                                                                                                \
+				cls->_validate_property(info);                                                                                                                                         \
+				info._update(p_property);                                                                                                                                              \
+				return true;                                                                                                                                                           \
+			}                                                                                                                                                                          \
+		}                                                                                                                                                                              \
+		return ret;                                                                                                                                                                    \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
 	static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) {                                                      \
 		if (p_instance && m_class::_get_to_string()) {                                                                                                                                 \
 			if (m_class::_get_to_string() != m_inherits::_get_to_string()) {                                                                                                           \
@@ -288,97 +350,126 @@ public:
 		}                                                                                                                                                                              \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static void *___binding_create_callback(void *p_token, void *p_instance) {                                                                                                         \
+	static void *_gde_binding_create_callback(void *p_token, void *p_instance) {                                                                                                       \
 		return nullptr;                                                                                                                                                                \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                                                                                           \
+	static void _gde_binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                                                                                         \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static GDExtensionBool ___binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) {                                                               \
+	static GDExtensionBool _gde_binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) {                                                             \
 		return true;                                                                                                                                                                   \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static constexpr GDExtensionInstanceBindingCallbacks ___binding_callbacks = {                                                                                                      \
-		___binding_create_callback,                                                                                                                                                    \
-		___binding_free_callback,                                                                                                                                                      \
-		___binding_reference_callback,                                                                                                                                                 \
-	};
+	static constexpr GDExtensionInstanceBindingCallbacks _gde_binding_callbacks = {                                                                                                    \
+		_gde_binding_create_callback,                                                                                                                                                  \
+		_gde_binding_free_callback,                                                                                                                                                    \
+		_gde_binding_reference_callback,                                                                                                                                               \
+	};                                                                                                                                                                                 \
+                                                                                                                                                                                       \
+private:
 
 // Don't use this for your classes, use GDCLASS() instead.
-#define GDEXTENSION_CLASS(m_class, m_inherits)                                                                           \
-private:                                                                                                                 \
-	void operator=(const m_class &p_rval) {}                                                                             \
-                                                                                                                         \
-protected:                                                                                                               \
-	virtual const GDExtensionInstanceBindingCallbacks *_get_bindings_callbacks() const override {                        \
-		return &___binding_callbacks;                                                                                    \
-	}                                                                                                                    \
-                                                                                                                         \
-	m_class(const char *p_godot_class) : m_inherits(p_godot_class) {}                                                    \
-	m_class(GodotObject *p_godot_object) : m_inherits(p_godot_object) {}                                                 \
-                                                                                                                         \
-	static void (*_get_bind_methods())() {                                                                               \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static void (Wrapped::*_get_notification())(int) {                                                                   \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static bool (Wrapped::*_get_set())(const ::godot::StringName &p_name, const Variant &p_property) {                   \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static bool (Wrapped::*_get_get())(const ::godot::StringName &p_name, Variant &r_ret) const {                        \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static void (Wrapped::*_get_get_property_list())(List<PropertyInfo> * p_list) const {                                \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static bool (Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) {                              \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static bool (Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, Variant &) {                   \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-	static String (Wrapped::*_get_to_string())() {                                                                       \
-		return nullptr;                                                                                                  \
-	}                                                                                                                    \
-                                                                                                                         \
-public:                                                                                                                  \
-	static void initialize_class() {}                                                                                    \
-                                                                                                                         \
-	static ::godot::StringName &get_class_static() {                                                                     \
-		static ::godot::StringName string_name = ::godot::StringName(#m_class);                                          \
-		return string_name;                                                                                              \
-	}                                                                                                                    \
-                                                                                                                         \
-	static ::godot::StringName &get_parent_class_static() {                                                              \
-		return m_inherits::get_class_static();                                                                           \
-	}                                                                                                                    \
-                                                                                                                         \
-	static void *___binding_create_callback(void *p_token, void *p_instance) {                                           \
-		/* Do not call memnew here, we don't want the postinitializer to be called */                                    \
-		return new ("") m_class((GodotObject *)p_instance);                                                              \
-	}                                                                                                                    \
-	static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                             \
-		/* Explicitly call the deconstructor to ensure proper lifecycle for non-trivial members */                       \
-		reinterpret_cast<m_class *>(p_binding)->~m_class();                                                              \
-		Memory::free_static(reinterpret_cast<m_class *>(p_binding));                                                     \
-	}                                                                                                                    \
-	static GDExtensionBool ___binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) { \
-		return true;                                                                                                     \
-	}                                                                                                                    \
-	static constexpr GDExtensionInstanceBindingCallbacks ___binding_callbacks = {                                        \
-		___binding_create_callback,                                                                                      \
-		___binding_free_callback,                                                                                        \
-		___binding_reference_callback,                                                                                   \
-	};                                                                                                                   \
-	m_class() : m_class(#m_class) {}
+#define GDEXTENSION_CLASS_ALIAS(m_class, m_alias_for, m_inherits) /******************************************************************************************************************/ \
+private:                                                                                                                                                                               \
+	inline static ::godot::internal::EngineClassRegistration<m_class> _gde_engine_class_registration_helper;                                                                           \
+	void operator=(const m_class &p_rval) {}                                                                                                                                           \
+                                                                                                                                                                                       \
+protected:                                                                                                                                                                             \
+	virtual const GDExtensionInstanceBindingCallbacks *_get_bindings_callbacks() const override {                                                                                      \
+		return &_gde_binding_callbacks;                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	m_class(const char *p_godot_class) : m_inherits(p_godot_class) {}                                                                                                                  \
+	m_class(GodotObject *p_godot_object) : m_inherits(p_godot_object) {}                                                                                                               \
+                                                                                                                                                                                       \
+	static void (*_get_bind_methods())() {                                                                                                                                             \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void (Wrapped::*_get_notification())(int) {                                                                                                                                 \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static bool (Wrapped::*_get_set())(const ::godot::StringName &p_name, const Variant &p_property) {                                                                                 \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static bool (Wrapped::*_get_get())(const ::godot::StringName &p_name, Variant &r_ret) const {                                                                                      \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static inline bool has_get_property_list() {                                                                                                                                       \
+		return false;                                                                                                                                                                  \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void (Wrapped::*_get_get_property_list())(List<PropertyInfo> * p_list) const {                                                                                              \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static bool (Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) const {                                                                                      \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static bool (Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, Variant &) const {                                                                           \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void (Wrapped::*_get_validate_property())(::godot::PropertyInfo & p_property) const {                                                                                       \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static String (Wrapped::*_get_to_string())() const {                                                                                                                               \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+public:                                                                                                                                                                                \
+	typedef m_class self_type;                                                                                                                                                         \
+                                                                                                                                                                                       \
+	static void initialize_class() {}                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static ::godot::StringName &get_class_static() {                                                                                                                                   \
+		static ::godot::StringName string_name = ::godot::StringName(#m_alias_for);                                                                                                    \
+		return string_name;                                                                                                                                                            \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static ::godot::StringName &get_parent_class_static() {                                                                                                                            \
+		return m_inherits::get_class_static();                                                                                                                                         \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static GDExtensionObjectPtr create(void *data) {                                                                                                                                   \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static GDExtensionClassInstancePtr recreate(void *data, GDExtensionObjectPtr obj) {                                                                                                \
+		return nullptr;                                                                                                                                                                \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void free(void *data, GDExtensionClassInstancePtr ptr) {                                                                                                                    \
+	}                                                                                                                                                                                  \
+                                                                                                                                                                                       \
+	static void *_gde_binding_create_callback(void *p_token, void *p_instance) {                                                                                                       \
+		/* Do not call memnew here, we don't want the post-initializer to be called */                                                                                                 \
+		return new ("", "") m_class((GodotObject *)p_instance);                                                                                                                        \
+	}                                                                                                                                                                                  \
+	static void _gde_binding_free_callback(void *p_token, void *p_instance, void *p_binding) {                                                                                         \
+		/* Explicitly call the deconstructor to ensure proper lifecycle for non-trivial members */                                                                                     \
+		reinterpret_cast<m_class *>(p_binding)->~m_class();                                                                                                                            \
+		Memory::free_static(reinterpret_cast<m_class *>(p_binding));                                                                                                                   \
+	}                                                                                                                                                                                  \
+	static GDExtensionBool _gde_binding_reference_callback(void *p_token, void *p_instance, GDExtensionBool p_reference) {                                                             \
+		return true;                                                                                                                                                                   \
+	}                                                                                                                                                                                  \
+	static constexpr GDExtensionInstanceBindingCallbacks _gde_binding_callbacks = {                                                                                                    \
+		_gde_binding_create_callback,                                                                                                                                                  \
+		_gde_binding_free_callback,                                                                                                                                                    \
+		_gde_binding_reference_callback,                                                                                                                                               \
+	};                                                                                                                                                                                 \
+	m_class() : m_class(#m_alias_for) {}                                                                                                                                               \
+                                                                                                                                                                                       \
+private:
+
+// Don't use this for your classes, use GDCLASS() instead.
+#define GDEXTENSION_CLASS(m_class, m_inherits) GDEXTENSION_CLASS_ALIAS(m_class, m_class, m_inherits)
 
 #endif // GODOT_WRAPPED_HPP

include/godot_cpp/core/binder_common.hpp

@@ -148,7 +148,7 @@ template <class T>
 struct VariantCasterAndValidate {
 	static _FORCE_INLINE_ T cast(const Variant **p_args, uint32_t p_arg_idx, GDExtensionCallError &r_error) {
 		GDExtensionVariantType argtype = GDExtensionVariantType(GetTypeInfo<T>::VARIANT_TYPE);
-		if (!internal::gde_interface->variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
+		if (!internal::gdextension_interface_variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
 				!VariantObjectClassChecker<T>::check(p_args[p_arg_idx])) {
 			r_error.error = GDEXTENSION_CALL_ERROR_INVALID_ARGUMENT;
 			r_error.argument = p_arg_idx;
@@ -163,7 +163,7 @@ template <class T>
 struct VariantCasterAndValidate<T &> {
 	static _FORCE_INLINE_ T cast(const Variant **p_args, uint32_t p_arg_idx, GDExtensionCallError &r_error) {
 		GDExtensionVariantType argtype = GDExtensionVariantType(GetTypeInfo<T>::VARIANT_TYPE);
-		if (!internal::gde_interface->variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
+		if (!internal::gdextension_interface_variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
 				!VariantObjectClassChecker<T>::check(p_args[p_arg_idx])) {
 			r_error.error = GDEXTENSION_CALL_ERROR_INVALID_ARGUMENT;
 			r_error.argument = p_arg_idx;
@@ -178,7 +178,7 @@ template <class T>
 struct VariantCasterAndValidate<const T &> {
 	static _FORCE_INLINE_ T cast(const Variant **p_args, uint32_t p_arg_idx, GDExtensionCallError &r_error) {
 		GDExtensionVariantType argtype = GDExtensionVariantType(GetTypeInfo<T>::VARIANT_TYPE);
-		if (!internal::gde_interface->variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
+		if (!internal::gdextension_interface_variant_can_convert_strict(static_cast<GDExtensionVariantType>(p_args[p_arg_idx]->get_type()), argtype) ||
 				!VariantObjectClassChecker<T>::check(p_args[p_arg_idx])) {
 			r_error.error = GDEXTENSION_CALL_ERROR_INVALID_ARGUMENT;
 			r_error.argument = p_arg_idx;
@@ -276,6 +276,60 @@ void call_with_variant_args_retc_helper(T *p_instance, R (T::*p_method)(P...) co
 	(void)p_args;
 }
 
+template <class T, class... P>
+void call_with_variant_args(T *p_instance, void (T::*p_method)(P...), const Variant **p_args, int p_argcount, GDExtensionCallError &r_error) {
+#ifdef DEBUG_ENABLED
+	if ((size_t)p_argcount > sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+
+	if ((size_t)p_argcount < sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+#endif
+	call_with_variant_args_helper<T, P...>(p_instance, p_method, p_args, r_error, BuildIndexSequence<sizeof...(P)>{});
+}
+
+template <class T, class R, class... P>
+void call_with_variant_args_ret(T *p_instance, R (T::*p_method)(P...), const Variant **p_args, int p_argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+#ifdef DEBUG_ENABLED
+	if ((size_t)p_argcount > sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+
+	if ((size_t)p_argcount < sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+#endif
+	call_with_variant_args_ret_helper<T, R, P...>(p_instance, p_method, p_args, r_ret, r_error, BuildIndexSequence<sizeof...(P)>{});
+}
+
+template <class T, class R, class... P>
+void call_with_variant_args_retc(T *p_instance, R (T::*p_method)(P...) const, const Variant **p_args, int p_argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+#ifdef DEBUG_ENABLED
+	if ((size_t)p_argcount > sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+
+	if ((size_t)p_argcount < sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+#endif
+	call_with_variant_args_retc_helper<T, R, P...>(p_instance, p_method, p_args, r_ret, r_error, BuildIndexSequence<sizeof...(P)>{});
+}
+
 template <class T, class... P>
 void call_with_variant_args_dv(T *p_instance, void (T::*p_method)(P...), const GDExtensionConstVariantPtr *p_args, int p_argcount, GDExtensionCallError &r_error, const std::vector<Variant> &default_values) {
 #ifdef DEBUG_ENABLED
@@ -538,6 +592,42 @@ void call_with_ptr_args_static_method(void (*p_method)(P...), const GDExtensionC
 	call_with_ptr_args_static_method_helper<P...>(p_method, p_args, BuildIndexSequence<sizeof...(P)>{});
 }
 
+template <class R, class... P>
+void call_with_variant_args_static_ret(R (*p_method)(P...), const Variant **p_args, int p_argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+#ifdef DEBUG_ENABLED
+	if ((size_t)p_argcount > sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+
+	if ((size_t)p_argcount < sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+#endif
+	call_with_variant_args_static_ret<R, P...>(p_method, p_args, r_ret, r_error, BuildIndexSequence<sizeof...(P)>{});
+}
+
+template <class... P>
+void call_with_variant_args_static_ret(void (*p_method)(P...), const Variant **p_args, int p_argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+#ifdef DEBUG_ENABLED
+	if ((size_t)p_argcount > sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+
+	if ((size_t)p_argcount < sizeof...(P)) {
+		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
+		r_error.argument = (int32_t)sizeof...(P);
+		return;
+	}
+#endif
+	call_with_variant_args_static<P...>(p_method, p_args, r_error, BuildIndexSequence<sizeof...(P)>{});
+}
+
 template <class R, class... P, size_t... Is>
 void call_with_variant_args_static_ret(R (*p_method)(P...), const Variant **p_args, Variant &r_ret, GDExtensionCallError &r_error, IndexSequence<Is...>) {
 	r_error.error = GDEXTENSION_CALL_OK;

include/godot_cpp/core/class_db.hpp

@@ -38,6 +38,12 @@
 #include <godot_cpp/core/method_bind.hpp>
 #include <godot_cpp/core/object.hpp>
 
+#include <godot_cpp/classes/class_db_singleton.hpp>
+
+// Makes callable_mp readily available in all classes connecting signals.
+// Needs to come after method_bind and object have been included.
+#include <godot_cpp/variant/callable_method_pointer.hpp>
+
 #include <list>
 #include <set>
 #include <string>
@@ -79,15 +85,6 @@ class ClassDB {
 	friend class godot::GDExtensionBinding;
 
 public:
-	struct PropertySetGet {
-		int index;
-		StringName setter;
-		StringName getter;
-		MethodBind *_setptr;
-		MethodBind *_getptr;
-		Variant::Type type;
-	};
-
 	struct ClassInfo {
 		StringName name;
 		StringName parent_name;
@@ -104,19 +101,28 @@ public:
 private:
 	// This may only contain custom classes, not Godot classes
 	static std::unordered_map<StringName, ClassInfo> classes;
+	static std::unordered_map<StringName, const GDExtensionInstanceBindingCallbacks *> instance_binding_callbacks;
+	// Used to remember the custom class registration order.
+	static std::vector<StringName> class_register_order;
 
 	static MethodBind *bind_methodfi(uint32_t p_flags, MethodBind *p_bind, const MethodDefinition &method_name, const void **p_defs, int p_defcount);
 	static void initialize_class(const ClassInfo &cl);
 	static void bind_method_godot(const StringName &p_class_name, MethodBind *p_method);
 
 	template <class T, bool is_abstract>
-	static void _register_class(bool p_virtual = false);
+	static void _register_class(bool p_virtual = false, bool p_exposed = true);
 
 public:
 	template <class T>
 	static void register_class(bool p_virtual = false);
 	template <class T>
 	static void register_abstract_class();
+	template <class T>
+	static void register_internal_class();
+
+	_FORCE_INLINE_ static void _register_engine_class(const StringName &p_name, const GDExtensionInstanceBindingCallbacks *p_callbacks) {
+		instance_binding_callbacks[p_name] = p_callbacks;
+	}
 
 	template <class N, class M, typename... VarArgs>
 	static MethodBind *bind_method(N p_method_name, M p_method, VarArgs... p_args);
@@ -137,30 +143,36 @@ public:
 	static MethodBind *get_method(const StringName &p_class, const StringName &p_method);
 
 	static GDExtensionClassCallVirtual get_virtual_func(void *p_userdata, GDExtensionConstStringNamePtr p_name);
+	static const GDExtensionInstanceBindingCallbacks *get_instance_binding_callbacks(const StringName &p_class);
 
 	static void initialize(GDExtensionInitializationLevel p_level);
 	static void deinitialize(GDExtensionInitializationLevel p_level);
+
+	CLASSDB_SINGLETON_FORWARD_METHODS;
 };
 
 #define BIND_CONSTANT(m_constant) \
 	godot::ClassDB::bind_integer_constant(get_class_static(), "", #m_constant, m_constant);
 
 #define BIND_ENUM_CONSTANT(m_constant) \
-	godot::ClassDB::bind_integer_constant(get_class_static(), godot::__constant_get_enum_name(m_constant, #m_constant), #m_constant, m_constant);
+	godot::ClassDB::bind_integer_constant(get_class_static(), godot::_gde_constant_get_enum_name(m_constant, #m_constant), #m_constant, m_constant);
 
 #define BIND_BITFIELD_FLAG(m_constant) \
-	godot::ClassDB::bind_integer_constant(get_class_static(), godot::__constant_get_bitfield_name(m_constant, #m_constant), #m_constant, m_constant, true);
+	godot::ClassDB::bind_integer_constant(get_class_static(), godot::_gde_constant_get_bitfield_name(m_constant, #m_constant), #m_constant, m_constant, true);
 
-#define BIND_VIRTUAL_METHOD(m_class, m_method)                                                                                                  \
-	{                                                                                                                                           \
-		auto ___call##m_method = [](GDExtensionObjectPtr p_instance, const GDExtensionConstTypePtr *p_args, GDExtensionTypePtr p_ret) -> void { \
-			call_with_ptr_args(reinterpret_cast<m_class *>(p_instance), &m_class::m_method, p_args, p_ret);                                     \
-		};                                                                                                                                      \
-		godot::ClassDB::bind_virtual_method(m_class::get_class_static(), #m_method, ___call##m_method);                                         \
+#define BIND_VIRTUAL_METHOD(m_class, m_method)                                                                                                \
+	{                                                                                                                                         \
+		auto _call##m_method = [](GDExtensionObjectPtr p_instance, const GDExtensionConstTypePtr *p_args, GDExtensionTypePtr p_ret) -> void { \
+			call_with_ptr_args(reinterpret_cast<m_class *>(p_instance), &m_class::m_method, p_args, p_ret);                                   \
+		};                                                                                                                                    \
+		godot::ClassDB::bind_virtual_method(m_class::get_class_static(), #m_method, _call##m_method);                                         \
 	}
 
 template <class T, bool is_abstract>
-void ClassDB::_register_class(bool p_virtual) {
+void ClassDB::_register_class(bool p_virtual, bool p_exposed) {
+	static_assert(TypesAreSame<typename T::self_type, T>::value, "Class not declared properly, please use GDCLASS.");
+	instance_binding_callbacks[T::get_class_static()] = &T::_gde_binding_callbacks;
+
 	// Register this class within our plugin
 	ClassInfo cl;
 	cl.name = T::get_class_static();
@@ -172,29 +184,35 @@ void ClassDB::_register_class(bool p_virtual) {
 		cl.parent_ptr = &parent_it->second;
 	}
 	classes[cl.name] = cl;
+	class_register_order.push_back(cl.name);
 
 	// Register this class with Godot
-	GDExtensionClassCreationInfo class_info = {
+	GDExtensionClassCreationInfo2 class_info = {
 		p_virtual, // GDExtensionBool is_virtual;
 		is_abstract, // GDExtensionBool is_abstract;
+		p_exposed, // GDExtensionBool is_exposed;
 		T::set_bind, // GDExtensionClassSet set_func;
 		T::get_bind, // GDExtensionClassGet get_func;
-		T::get_property_list_bind, // GDExtensionClassGetPropertyList get_property_list_func;
+		T::has_get_property_list() ? T::get_property_list_bind : nullptr, // GDExtensionClassGetPropertyList get_property_list_func;
 		T::free_property_list_bind, // GDExtensionClassFreePropertyList free_property_list_func;
 		T::property_can_revert_bind, // GDExtensionClassPropertyCanRevert property_can_revert_func;
 		T::property_get_revert_bind, // GDExtensionClassPropertyGetRevert property_get_revert_func;
-		T::notification_bind, // GDExtensionClassNotification notification_func;
+		T::validate_property_bind, // GDExtensionClassValidateProperty validate_property_func;
+		T::notification_bind, // GDExtensionClassNotification2 notification_func;
 		T::to_string_bind, // GDExtensionClassToString to_string_func;
 		nullptr, // GDExtensionClassReference reference_func;
 		nullptr, // GDExtensionClassUnreference unreference_func;
 		T::create, // GDExtensionClassCreateInstance create_instance_func; /* this one is mandatory */
 		T::free, // GDExtensionClassFreeInstance free_instance_func; /* this one is mandatory */
+		T::recreate, // GDExtensionClassRecreateInstance recreate_instance_func;
 		&ClassDB::get_virtual_func, // GDExtensionClassGetVirtual get_virtual_func;
+		nullptr, // GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
+		nullptr, // GDExtensionClassCallVirtualWithData call_virtual_func;
 		nullptr, // GDExtensionClassGetRID get_rid;
 		(void *)&T::get_class_static(), // void *class_userdata;
 	};
 
-	internal::gde_interface->classdb_register_extension_class(internal::library, cl.name._native_ptr(), cl.parent_name._native_ptr(), &class_info);
+	internal::gdextension_interface_classdb_register_extension_class2(internal::library, cl.name._native_ptr(), cl.parent_name._native_ptr(), &class_info);
 
 	// call bind_methods etc. to register all members of the class
 	T::initialize_class();
@@ -213,6 +231,11 @@ void ClassDB::register_abstract_class() {
 	ClassDB::_register_class<T, true>();
 }
 
+template <class T>
+void ClassDB::register_internal_class() {
+	ClassDB::_register_class<T, false>(false, false);
+}
+
 template <class N, class M, typename... VarArgs>
 MethodBind *ClassDB::bind_method(N p_method_name, M p_method, VarArgs... p_args) {
 	Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
@@ -239,7 +262,7 @@ MethodBind *ClassDB::bind_static_method(StringName p_class, N p_method_name, M p
 template <class M>
 MethodBind *ClassDB::bind_vararg_method(uint32_t p_flags, StringName p_name, M p_method, const MethodInfo &p_info, const std::vector<Variant> &p_default_args, bool p_return_nil_is_variant) {
 	MethodBind *bind = create_vararg_method_bind(p_method, p_info, p_return_nil_is_variant);
-	ERR_FAIL_COND_V(!bind, nullptr);
+	ERR_FAIL_NULL_V(bind, nullptr);
 
 	bind->set_name(p_name);
 	bind->set_default_arguments(p_default_args);
@@ -271,6 +294,7 @@ MethodBind *ClassDB::bind_vararg_method(uint32_t p_flags, StringName p_name, M p
 #define GDREGISTER_CLASS(m_class) ClassDB::register_class<m_class>();
 #define GDREGISTER_VIRTUAL_CLASS(m_class) ClassDB::register_class<m_class>(true);
 #define GDREGISTER_ABSTRACT_CLASS(m_class) ClassDB::register_abstract_class<m_class>();
+#define GDREGISTER_INTERNAL_CLASS(m_class) ClassDB::register_internal_class<m_class>();
 
 } // namespace godot
 

include/godot_cpp/core/engine_ptrcall.hpp

@@ -47,25 +47,25 @@ template <class O, class... Args>
 O *_call_native_mb_ret_obj(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
 	GodotObject *ret = nullptr;
 	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
-	internal::gde_interface->object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
+	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
 	if (ret == nullptr) {
 		return nullptr;
 	}
-	return reinterpret_cast<O *>(internal::gde_interface->object_get_instance_binding(ret, internal::token, &O::___binding_callbacks));
+	return reinterpret_cast<O *>(internal::get_object_instance_binding(ret));
 }
 
 template <class R, class... Args>
 R _call_native_mb_ret(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
 	R ret;
 	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
-	internal::gde_interface->object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
+	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
 	return ret;
 }
 
 template <class... Args>
 void _call_native_mb_no_ret(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
 	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
-	internal::gde_interface->object_method_bind_ptrcall(mb, instance, mb_args.data(), nullptr);
+	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), nullptr);
 }
 
 template <class R, class... Args>
@@ -81,7 +81,7 @@ Object *_call_utility_ret_obj(const GDExtensionPtrUtilityFunction func, void *in
 	GodotObject *ret = nullptr;
 	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
 	func(&ret, mb_args.data(), mb_args.size());
-	return (Object *)internal::gde_interface->object_get_instance_binding(ret, internal::token, &Object::___binding_callbacks);
+	return (Object *)internal::get_object_instance_binding(ret);
 }
 
 template <class... Args>

include/godot_cpp/core/memory.hpp

@@ -44,20 +44,21 @@
 #define PAD_ALIGN 16 //must always be greater than this at much
 #endif
 
-void *operator new(size_t p_size, const char *p_description); ///< operator new that takes a description and uses MemoryStaticPool
-void *operator new(size_t p_size, void *(*p_allocfunc)(size_t p_size)); ///< operator new that takes a description and uses MemoryStaticPool
-void *operator new(size_t p_size, void *p_pointer, size_t check, const char *p_description); ///< operator new that takes a description and uses a pointer to the preallocated memory
+// p_dummy argument is added to avoid conflicts with the engine functions when both engine and GDExtension are built as a static library on iOS.
+void *operator new(size_t p_size, const char *p_dummy, const char *p_description); ///< operator new that takes a description and uses MemoryStaticPool
+void *operator new(size_t p_size, const char *p_dummy, void *(*p_allocfunc)(size_t p_size)); ///< operator new that takes a description and uses MemoryStaticPool
+void *operator new(size_t p_size, const char *p_dummy, void *p_pointer, size_t check, const char *p_description); ///< operator new that takes a description and uses a pointer to the preallocated memory
 
-_ALWAYS_INLINE_ void *operator new(size_t p_size, void *p_pointer, size_t check, const char *p_description) {
+_ALWAYS_INLINE_ void *operator new(size_t p_size, const char *p_dummy, void *p_pointer, size_t check, const char *p_description) {
 	return p_pointer;
 }
 
 #ifdef _MSC_VER
 // When compiling with VC++ 2017, the above declarations of placement new generate many irrelevant warnings (C4291).
 // The purpose of the following definitions is to muffle these warnings, not to provide a usable implementation of placement delete.
-void operator delete(void *p_mem, const char *p_description);
-void operator delete(void *p_mem, void *(*p_allocfunc)(size_t p_size));
-void operator delete(void *p_mem, void *p_pointer, size_t check, const char *p_description);
+void operator delete(void *p_mem, const char *p_dummy, const char *p_description);
+void operator delete(void *p_mem, const char *p_dummy, void *(*p_allocfunc)(size_t p_size));
+void operator delete(void *p_mem, const char *p_dummy, void *p_pointer, size_t check, const char *p_description);
 #endif
 
 namespace godot {
@@ -85,10 +86,10 @@ _ALWAYS_INLINE_ T *_post_initialize(T *p_obj) {
 #define memrealloc(m_mem, m_size) ::godot::Memory::realloc_static(m_mem, m_size)
 #define memfree(m_mem) ::godot::Memory::free_static(m_mem)
 
-#define memnew(m_class) ::godot::_post_initialize(new ("") m_class)
+#define memnew(m_class) ::godot::_post_initialize(new ("", "") m_class)
 
-#define memnew_allocator(m_class, m_allocator) ::godot::_post_initialize(new (m_allocator::alloc) m_class)
-#define memnew_placement(m_placement, m_class) ::godot::_post_initialize(new (m_placement, sizeof(m_class), "") m_class)
+#define memnew_allocator(m_class, m_allocator) ::godot::_post_initialize(new ("", m_allocator::alloc) m_class)
+#define memnew_placement(m_placement, m_class) ::godot::_post_initialize(new ("", m_placement, sizeof(m_class), "") m_class)
 
 // Generic comparator used in Map, List, etc.
 template <class T>
@@ -107,7 +108,7 @@ void memdelete(T *p_class, typename std::enable_if<!std::is_base_of_v<godot::Wra
 
 template <class T, std::enable_if_t<std::is_base_of_v<godot::Wrapped, T>, bool> = true>
 void memdelete(T *p_class) {
-	godot::internal::gde_interface->object_destroy(p_class->_owner);
+	godot::internal::gdextension_interface_object_destroy(p_class->_owner);
 }
 
 template <class T, class A>
@@ -146,7 +147,7 @@ T *memnew_arr_template(size_t p_elements, const char *p_descr = "") {
 	size_t len = sizeof(T) * p_elements;
 	uint64_t *mem = (uint64_t *)Memory::alloc_static(len, true);
 	T *failptr = nullptr; // Get rid of a warning.
-	ERR_FAIL_COND_V(!mem, failptr);
+	ERR_FAIL_NULL_V(mem, failptr);
 	*(mem - 1) = p_elements;
 
 	if (!std::is_trivially_destructible<T>::value) {
@@ -154,7 +155,7 @@ T *memnew_arr_template(size_t p_elements, const char *p_descr = "") {
 
 		/* call operator new */
 		for (size_t i = 0; i < p_elements; i++) {
-			new (&elems[i], sizeof(T), p_descr) T;
+			new ("", &elems[i], sizeof(T), p_descr) T;
 		}
 	}
 

include/godot_cpp/core/method_bind.hpp

@@ -268,8 +268,8 @@ MethodBind *create_vararg_method_bind(R (T::*p_method)(const Variant **, GDExten
 }
 
 #ifndef TYPED_METHOD_BIND
-class ___UnexistingClass;
-#define MB_T ___UnexistingClass
+class _gde_UnexistingClass;
+#define MB_T _gde_UnexistingClass
 #else
 #define MB_T T
 #endif

include/godot_cpp/core/method_ptrcall.hpp

@@ -33,6 +33,7 @@
 
 #include <godot_cpp/core/defs.hpp>
 
+#include <godot_cpp/core/object.hpp>
 #include <godot_cpp/godot.hpp>
 #include <godot_cpp/variant/variant.hpp>
 
@@ -167,8 +168,9 @@ MAKE_PTRARG_BY_REFERENCE(Variant);
 
 template <class T>
 struct PtrToArg<T *> {
+	static_assert(std::is_base_of<Object, T>::value, "Cannot encode non-Object value as an Object");
 	_FORCE_INLINE_ static T *convert(const void *p_ptr) {
-		return reinterpret_cast<T *>(godot::internal::gde_interface->object_get_instance_binding(*reinterpret_cast<GDExtensionObjectPtr *>(const_cast<void *>(p_ptr)), godot::internal::token, &T::___binding_callbacks));
+		return reinterpret_cast<T *>(godot::internal::get_object_instance_binding(*reinterpret_cast<GDExtensionObjectPtr *>(const_cast<void *>(p_ptr))));
 	}
 	typedef Object *EncodeT;
 	_FORCE_INLINE_ static void encode(T *p_var, void *p_ptr) {
@@ -178,8 +180,9 @@ struct PtrToArg<T *> {
 
 template <class T>
 struct PtrToArg<const T *> {
+	static_assert(std::is_base_of<Object, T>::value, "Cannot encode non-Object value as an Object");
 	_FORCE_INLINE_ static const T *convert(const void *p_ptr) {
-		return reinterpret_cast<const T *>(godot::internal::gde_interface->object_get_instance_binding(*reinterpret_cast<GDExtensionObjectPtr *>(const_cast<void *>(p_ptr)), godot::internal::token, &T::___binding_callbacks));
+		return reinterpret_cast<const T *>(godot::internal::get_object_instance_binding(*reinterpret_cast<GDExtensionObjectPtr *>(const_cast<void *>(p_ptr))));
 	}
 	typedef const Object *EncodeT;
 	_FORCE_INLINE_ static void encode(T *p_var, void *p_ptr) {

include/godot_cpp/core/object.hpp

@@ -33,6 +33,8 @@
 
 #include <godot_cpp/core/defs.hpp>
 
+#include <godot_cpp/core/object_id.hpp>
+
 #include <godot_cpp/core/property_info.hpp>
 
 #include <godot_cpp/variant/variant.hpp>
@@ -49,9 +51,16 @@
 #define ADD_GROUP(m_name, m_prefix) godot::ClassDB::add_property_group(get_class_static(), m_name, m_prefix)
 #define ADD_SUBGROUP(m_name, m_prefix) godot::ClassDB::add_property_subgroup(get_class_static(), m_name, m_prefix)
 #define ADD_PROPERTY(m_property, m_setter, m_getter) godot::ClassDB::add_property(get_class_static(), m_property, m_setter, m_getter)
+#define ADD_PROPERTYI(m_property, m_setter, m_getter, m_index) godot::ClassDB::add_property(get_class_static(), m_property, m_setter, m_getter, m_index)
 
 namespace godot {
 
+namespace internal {
+
+Object *get_object_instance_binding(GodotObject *);
+
+} // namespace internal
+
 struct MethodInfo {
 	StringName name;
 	PropertyInfo return_val;
@@ -99,36 +108,14 @@ MethodInfo::MethodInfo(const PropertyInfo &p_ret, StringName p_name, const Args
 	arguments = { args... };
 }
 
-class ObjectID {
-	uint64_t id = 0;
-
-public:
-	_FORCE_INLINE_ bool is_ref_counted() const { return (id & (uint64_t(1) << 63)) != 0; }
-	_FORCE_INLINE_ bool is_valid() const { return id != 0; }
-	_FORCE_INLINE_ bool is_null() const { return id == 0; }
-	_FORCE_INLINE_ operator uint64_t() const { return id; }
-	_FORCE_INLINE_ operator int64_t() const { return id; }
-
-	_FORCE_INLINE_ bool operator==(const ObjectID &p_id) const { return id == p_id.id; }
-	_FORCE_INLINE_ bool operator!=(const ObjectID &p_id) const { return id != p_id.id; }
-	_FORCE_INLINE_ bool operator<(const ObjectID &p_id) const { return id < p_id.id; }
-
-	_FORCE_INLINE_ void operator=(int64_t p_int64) { id = p_int64; }
-	_FORCE_INLINE_ void operator=(uint64_t p_uint64) { id = p_uint64; }
-
-	_FORCE_INLINE_ ObjectID() {}
-	_FORCE_INLINE_ explicit ObjectID(const uint64_t p_id) { id = p_id; }
-	_FORCE_INLINE_ explicit ObjectID(const int64_t p_id) { id = p_id; }
-};
-
 class ObjectDB {
 public:
 	static Object *get_instance(uint64_t p_object_id) {
-		GDExtensionObjectPtr obj = internal::gde_interface->object_get_instance_from_id(p_object_id);
+		GDExtensionObjectPtr obj = internal::gdextension_interface_object_get_instance_from_id(p_object_id);
 		if (obj == nullptr) {
 			return nullptr;
 		}
-		return reinterpret_cast<Object *>(internal::gde_interface->object_get_instance_binding(obj, internal::token, &Object::___binding_callbacks));
+		return internal::get_object_instance_binding(obj);
 	}
 };
 
@@ -138,11 +125,11 @@ T *Object::cast_to(Object *p_object) {
 		return nullptr;
 	}
 	StringName class_name = T::get_class_static();
-	GDExtensionObjectPtr casted = internal::gde_interface->object_cast_to(p_object->_owner, internal::gde_interface->classdb_get_class_tag(class_name._native_ptr()));
+	GDExtensionObjectPtr casted = internal::gdextension_interface_object_cast_to(p_object->_owner, internal::gdextension_interface_classdb_get_class_tag(class_name._native_ptr()));
 	if (casted == nullptr) {
 		return nullptr;
 	}
-	return reinterpret_cast<T *>(internal::gde_interface->object_get_instance_binding(casted, internal::token, &T::___binding_callbacks));
+	return dynamic_cast<T *>(internal::get_object_instance_binding(casted));
 }
 
 template <class T>
@@ -151,11 +138,11 @@ const T *Object::cast_to(const Object *p_object) {
 		return nullptr;
 	}
 	StringName class_name = T::get_class_static();
-	GDExtensionObjectPtr casted = internal::gde_interface->object_cast_to(p_object->_owner, internal::gde_interface->classdb_get_class_tag(class_name._native_ptr()));
+	GDExtensionObjectPtr casted = internal::gdextension_interface_object_cast_to(p_object->_owner, internal::gdextension_interface_classdb_get_class_tag(class_name._native_ptr()));
 	if (casted == nullptr) {
 		return nullptr;
 	}
-	return reinterpret_cast<const T *>(internal::gde_interface->object_get_instance_binding(casted, internal::token, &T::___binding_callbacks));
+	return dynamic_cast<const T *>(internal::get_object_instance_binding(casted));
 }
 
 } // namespace godot

include/godot_cpp/core/object_id.hpp

@@ -0,0 +1,62 @@
+/**************************************************************************/
+/*  object_id.hpp                                                         */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_OBJECT_ID_HPP
+#define GODOT_OBJECT_ID_HPP
+
+#include <godot_cpp/core/defs.hpp>
+
+namespace godot {
+
+class ObjectID {
+	uint64_t id = 0;
+
+public:
+	_FORCE_INLINE_ bool is_ref_counted() const { return (id & (uint64_t(1) << 63)) != 0; }
+	_FORCE_INLINE_ bool is_valid() const { return id != 0; }
+	_FORCE_INLINE_ bool is_null() const { return id == 0; }
+	_FORCE_INLINE_ operator uint64_t() const { return id; }
+	_FORCE_INLINE_ operator int64_t() const { return id; }
+
+	_FORCE_INLINE_ bool operator==(const ObjectID &p_id) const { return id == p_id.id; }
+	_FORCE_INLINE_ bool operator!=(const ObjectID &p_id) const { return id != p_id.id; }
+	_FORCE_INLINE_ bool operator<(const ObjectID &p_id) const { return id < p_id.id; }
+
+	_FORCE_INLINE_ void operator=(int64_t p_int64) { id = p_int64; }
+	_FORCE_INLINE_ void operator=(uint64_t p_uint64) { id = p_uint64; }
+
+	_FORCE_INLINE_ ObjectID() {}
+	_FORCE_INLINE_ explicit ObjectID(const uint64_t p_id) { id = p_id; }
+	_FORCE_INLINE_ explicit ObjectID(const int64_t p_id) { id = p_id; }
+};
+
+} // namespace godot
+
+#endif // GODOT_OBJECT_ID_HPP

include/godot_cpp/core/property_info.hpp

@@ -68,6 +68,18 @@ struct PropertyInfo {
 
 	PropertyInfo(GDExtensionVariantType p_type, const StringName &p_name, PropertyHint p_hint = PROPERTY_HINT_NONE, const String &p_hint_string = "", uint32_t p_usage = PROPERTY_USAGE_DEFAULT, const StringName &p_class_name = "") :
 			PropertyInfo((Variant::Type)p_type, p_name, p_hint, p_hint_string, p_usage, p_class_name) {}
+
+	PropertyInfo(const GDExtensionPropertyInfo *p_info) :
+			PropertyInfo(p_info->type, *reinterpret_cast<StringName *>(p_info->name), (PropertyHint)p_info->hint, *reinterpret_cast<String *>(p_info->hint_string), p_info->usage, *reinterpret_cast<StringName *>(p_info->class_name)) {}
+
+	void _update(GDExtensionPropertyInfo *p_info) {
+		p_info->type = (GDExtensionVariantType)type;
+		*(reinterpret_cast<StringName *>(p_info->name)) = name;
+		p_info->hint = hint;
+		*(reinterpret_cast<String *>(p_info->hint_string)) = hint_string;
+		p_info->usage = usage;
+		*(reinterpret_cast<StringName *>(p_info->class_name)) = class_name;
+	}
 };
 
 } // namespace godot

include/godot_cpp/core/type_info.hpp

@@ -241,7 +241,7 @@ inline String enum_qualified_name_to_class_info_name(const String &p_qualified_n
 	TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, const m_enum &)
 
 template <typename T>
-inline StringName __constant_get_enum_name(T param, StringName p_constant) {
+inline StringName _gde_constant_get_enum_name(T param, StringName p_constant) {
 	if (GetTypeInfo<T>::VARIANT_TYPE == Variant::NIL) {
 		ERR_PRINT(("Missing VARIANT_ENUM_CAST for constant's enum: " + String(p_constant)).utf8().get_data());
 	}
@@ -288,7 +288,7 @@ public:
 	TEMPL_MAKE_BITFIELD_TYPE_INFO(m_enum, const m_enum &)
 
 template <typename T>
-inline StringName __constant_get_bitfield_name(T param, StringName p_constant) {
+inline StringName _gde_constant_get_bitfield_name(T param, StringName p_constant) {
 	if (GetTypeInfo<T>::VARIANT_TYPE == Variant::NIL) {
 		ERR_PRINT(("Missing VARIANT_ENUM_CAST for constant's bitfield: " + String(p_constant)).utf8().get_data());
 	}

include/godot_cpp/godot.hpp

@@ -37,42 +37,204 @@ namespace godot {
 
 namespace internal {
 
-extern "C" const GDExtensionInterface *gde_interface;
+extern "C" GDExtensionInterfaceGetProcAddress gdextension_interface_get_proc_address;
 extern "C" GDExtensionClassLibraryPtr library;
 extern "C" void *token;
 
+extern "C" GDExtensionGodotVersion godot_version;
+
+// All of the GDExtension interface functions.
+extern "C" GDExtensionInterfaceGetGodotVersion gdextension_interface_get_godot_version;
+extern "C" GDExtensionInterfaceMemAlloc gdextension_interface_mem_alloc;
+extern "C" GDExtensionInterfaceMemRealloc gdextension_interface_mem_realloc;
+extern "C" GDExtensionInterfaceMemFree gdextension_interface_mem_free;
+extern "C" GDExtensionInterfacePrintError gdextension_interface_print_error;
+extern "C" GDExtensionInterfacePrintErrorWithMessage gdextension_interface_print_error_with_message;
+extern "C" GDExtensionInterfacePrintWarning gdextension_interface_print_warning;
+extern "C" GDExtensionInterfacePrintWarningWithMessage gdextension_interface_print_warning_with_message;
+extern "C" GDExtensionInterfacePrintScriptError gdextension_interface_print_script_error;
+extern "C" GDExtensionInterfacePrintScriptErrorWithMessage gdextension_interface_print_script_error_with_message;
+extern "C" GDExtensionInterfaceGetNativeStructSize gdextension_interface_get_native_struct_size;
+extern "C" GDExtensionInterfaceVariantNewCopy gdextension_interface_variant_new_copy;
+extern "C" GDExtensionInterfaceVariantNewNil gdextension_interface_variant_new_nil;
+extern "C" GDExtensionInterfaceVariantDestroy gdextension_interface_variant_destroy;
+extern "C" GDExtensionInterfaceVariantCall gdextension_interface_variant_call;
+extern "C" GDExtensionInterfaceVariantCallStatic gdextension_interface_variant_call_static;
+extern "C" GDExtensionInterfaceVariantEvaluate gdextension_interface_variant_evaluate;
+extern "C" GDExtensionInterfaceVariantSet gdextension_interface_variant_set;
+extern "C" GDExtensionInterfaceVariantSetNamed gdextension_interface_variant_set_named;
+extern "C" GDExtensionInterfaceVariantSetKeyed gdextension_interface_variant_set_keyed;
+extern "C" GDExtensionInterfaceVariantSetIndexed gdextension_interface_variant_set_indexed;
+extern "C" GDExtensionInterfaceVariantGet gdextension_interface_variant_get;
+extern "C" GDExtensionInterfaceVariantGetNamed gdextension_interface_variant_get_named;
+extern "C" GDExtensionInterfaceVariantGetKeyed gdextension_interface_variant_get_keyed;
+extern "C" GDExtensionInterfaceVariantGetIndexed gdextension_interface_variant_get_indexed;
+extern "C" GDExtensionInterfaceVariantIterInit gdextension_interface_variant_iter_init;
+extern "C" GDExtensionInterfaceVariantIterNext gdextension_interface_variant_iter_next;
+extern "C" GDExtensionInterfaceVariantIterGet gdextension_interface_variant_iter_get;
+extern "C" GDExtensionInterfaceVariantHash gdextension_interface_variant_hash;
+extern "C" GDExtensionInterfaceVariantRecursiveHash gdextension_interface_variant_recursive_hash;
+extern "C" GDExtensionInterfaceVariantHashCompare gdextension_interface_variant_hash_compare;
+extern "C" GDExtensionInterfaceVariantBooleanize gdextension_interface_variant_booleanize;
+extern "C" GDExtensionInterfaceVariantDuplicate gdextension_interface_variant_duplicate;
+extern "C" GDExtensionInterfaceVariantStringify gdextension_interface_variant_stringify;
+extern "C" GDExtensionInterfaceVariantGetType gdextension_interface_variant_get_type;
+extern "C" GDExtensionInterfaceVariantHasMethod gdextension_interface_variant_has_method;
+extern "C" GDExtensionInterfaceVariantHasMember gdextension_interface_variant_has_member;
+extern "C" GDExtensionInterfaceVariantHasKey gdextension_interface_variant_has_key;
+extern "C" GDExtensionInterfaceVariantGetTypeName gdextension_interface_variant_get_type_name;
+extern "C" GDExtensionInterfaceVariantCanConvert gdextension_interface_variant_can_convert;
+extern "C" GDExtensionInterfaceVariantCanConvertStrict gdextension_interface_variant_can_convert_strict;
+extern "C" GDExtensionInterfaceGetVariantFromTypeConstructor gdextension_interface_get_variant_from_type_constructor;
+extern "C" GDExtensionInterfaceGetVariantToTypeConstructor gdextension_interface_get_variant_to_type_constructor;
+extern "C" GDExtensionInterfaceVariantGetPtrOperatorEvaluator gdextension_interface_variant_get_ptr_operator_evaluator;
+extern "C" GDExtensionInterfaceVariantGetPtrBuiltinMethod gdextension_interface_variant_get_ptr_builtin_method;
+extern "C" GDExtensionInterfaceVariantGetPtrConstructor gdextension_interface_variant_get_ptr_constructor;
+extern "C" GDExtensionInterfaceVariantGetPtrDestructor gdextension_interface_variant_get_ptr_destructor;
+extern "C" GDExtensionInterfaceVariantConstruct gdextension_interface_variant_construct;
+extern "C" GDExtensionInterfaceVariantGetPtrSetter gdextension_interface_variant_get_ptr_setter;
+extern "C" GDExtensionInterfaceVariantGetPtrGetter gdextension_interface_variant_get_ptr_getter;
+extern "C" GDExtensionInterfaceVariantGetPtrIndexedSetter gdextension_interface_variant_get_ptr_indexed_setter;
+extern "C" GDExtensionInterfaceVariantGetPtrIndexedGetter gdextension_interface_variant_get_ptr_indexed_getter;
+extern "C" GDExtensionInterfaceVariantGetPtrKeyedSetter gdextension_interface_variant_get_ptr_keyed_setter;
+extern "C" GDExtensionInterfaceVariantGetPtrKeyedGetter gdextension_interface_variant_get_ptr_keyed_getter;
+extern "C" GDExtensionInterfaceVariantGetPtrKeyedChecker gdextension_interface_variant_get_ptr_keyed_checker;
+extern "C" GDExtensionInterfaceVariantGetConstantValue gdextension_interface_variant_get_constant_value;
+extern "C" GDExtensionInterfaceVariantGetPtrUtilityFunction gdextension_interface_variant_get_ptr_utility_function;
+extern "C" GDExtensionInterfaceStringNewWithLatin1Chars gdextension_interface_string_new_with_latin1_chars;
+extern "C" GDExtensionInterfaceStringNewWithUtf8Chars gdextension_interface_string_new_with_utf8_chars;
+extern "C" GDExtensionInterfaceStringNewWithUtf16Chars gdextension_interface_string_new_with_utf16_chars;
+extern "C" GDExtensionInterfaceStringNewWithUtf32Chars gdextension_interface_string_new_with_utf32_chars;
+extern "C" GDExtensionInterfaceStringNewWithWideChars gdextension_interface_string_new_with_wide_chars;
+extern "C" GDExtensionInterfaceStringNewWithLatin1CharsAndLen gdextension_interface_string_new_with_latin1_chars_and_len;
+extern "C" GDExtensionInterfaceStringNewWithUtf8CharsAndLen gdextension_interface_string_new_with_utf8_chars_and_len;
+extern "C" GDExtensionInterfaceStringNewWithUtf16CharsAndLen gdextension_interface_string_new_with_utf16_chars_and_len;
+extern "C" GDExtensionInterfaceStringNewWithUtf32CharsAndLen gdextension_interface_string_new_with_utf32_chars_and_len;
+extern "C" GDExtensionInterfaceStringNewWithWideCharsAndLen gdextension_interface_string_new_with_wide_chars_and_len;
+extern "C" GDExtensionInterfaceStringToLatin1Chars gdextension_interface_string_to_latin1_chars;
+extern "C" GDExtensionInterfaceStringToUtf8Chars gdextension_interface_string_to_utf8_chars;
+extern "C" GDExtensionInterfaceStringToUtf16Chars gdextension_interface_string_to_utf16_chars;
+extern "C" GDExtensionInterfaceStringToUtf32Chars gdextension_interface_string_to_utf32_chars;
+extern "C" GDExtensionInterfaceStringToWideChars gdextension_interface_string_to_wide_chars;
+extern "C" GDExtensionInterfaceStringOperatorIndex gdextension_interface_string_operator_index;
+extern "C" GDExtensionInterfaceStringOperatorIndexConst gdextension_interface_string_operator_index_const;
+extern "C" GDExtensionInterfaceStringOperatorPlusEqString gdextension_interface_string_operator_plus_eq_string;
+extern "C" GDExtensionInterfaceStringOperatorPlusEqChar gdextension_interface_string_operator_plus_eq_char;
+extern "C" GDExtensionInterfaceStringOperatorPlusEqCstr gdextension_interface_string_operator_plus_eq_cstr;
+extern "C" GDExtensionInterfaceStringOperatorPlusEqWcstr gdextension_interface_string_operator_plus_eq_wcstr;
+extern "C" GDExtensionInterfaceStringOperatorPlusEqC32str gdextension_interface_string_operator_plus_eq_c32str;
+extern "C" GDExtensionInterfaceStringResize gdextension_interface_string_resize;
+extern "C" GDExtensionInterfaceStringNameNewWithLatin1Chars gdextension_interface_string_name_new_with_latin1_chars;
+extern "C" GDExtensionInterfaceXmlParserOpenBuffer gdextension_interface_xml_parser_open_buffer;
+extern "C" GDExtensionInterfaceFileAccessStoreBuffer gdextension_interface_file_access_store_buffer;
+extern "C" GDExtensionInterfaceFileAccessGetBuffer gdextension_interface_file_access_get_buffer;
+extern "C" GDExtensionInterfaceWorkerThreadPoolAddNativeGroupTask gdextension_interface_worker_thread_pool_add_native_group_task;
+extern "C" GDExtensionInterfaceWorkerThreadPoolAddNativeTask gdextension_interface_worker_thread_pool_add_native_task;
+extern "C" GDExtensionInterfacePackedByteArrayOperatorIndex gdextension_interface_packed_byte_array_operator_index;
+extern "C" GDExtensionInterfacePackedByteArrayOperatorIndexConst gdextension_interface_packed_byte_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedColorArrayOperatorIndex gdextension_interface_packed_color_array_operator_index;
+extern "C" GDExtensionInterfacePackedColorArrayOperatorIndexConst gdextension_interface_packed_color_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedFloat32ArrayOperatorIndex gdextension_interface_packed_float32_array_operator_index;
+extern "C" GDExtensionInterfacePackedFloat32ArrayOperatorIndexConst gdextension_interface_packed_float32_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedFloat64ArrayOperatorIndex gdextension_interface_packed_float64_array_operator_index;
+extern "C" GDExtensionInterfacePackedFloat64ArrayOperatorIndexConst gdextension_interface_packed_float64_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedInt32ArrayOperatorIndex gdextension_interface_packed_int32_array_operator_index;
+extern "C" GDExtensionInterfacePackedInt32ArrayOperatorIndexConst gdextension_interface_packed_int32_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedInt64ArrayOperatorIndex gdextension_interface_packed_int64_array_operator_index;
+extern "C" GDExtensionInterfacePackedInt64ArrayOperatorIndexConst gdextension_interface_packed_int64_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedStringArrayOperatorIndex gdextension_interface_packed_string_array_operator_index;
+extern "C" GDExtensionInterfacePackedStringArrayOperatorIndexConst gdextension_interface_packed_string_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedVector2ArrayOperatorIndex gdextension_interface_packed_vector2_array_operator_index;
+extern "C" GDExtensionInterfacePackedVector2ArrayOperatorIndexConst gdextension_interface_packed_vector2_array_operator_index_const;
+extern "C" GDExtensionInterfacePackedVector3ArrayOperatorIndex gdextension_interface_packed_vector3_array_operator_index;
+extern "C" GDExtensionInterfacePackedVector3ArrayOperatorIndexConst gdextension_interface_packed_vector3_array_operator_index_const;
+extern "C" GDExtensionInterfaceArrayOperatorIndex gdextension_interface_array_operator_index;
+extern "C" GDExtensionInterfaceArrayOperatorIndexConst gdextension_interface_array_operator_index_const;
+extern "C" GDExtensionInterfaceArrayRef gdextension_interface_array_ref;
+extern "C" GDExtensionInterfaceArraySetTyped gdextension_interface_array_set_typed;
+extern "C" GDExtensionInterfaceDictionaryOperatorIndex gdextension_interface_dictionary_operator_index;
+extern "C" GDExtensionInterfaceDictionaryOperatorIndexConst gdextension_interface_dictionary_operator_index_const;
+extern "C" GDExtensionInterfaceObjectMethodBindCall gdextension_interface_object_method_bind_call;
+extern "C" GDExtensionInterfaceObjectMethodBindPtrcall gdextension_interface_object_method_bind_ptrcall;
+extern "C" GDExtensionInterfaceObjectDestroy gdextension_interface_object_destroy;
+extern "C" GDExtensionInterfaceGlobalGetSingleton gdextension_interface_global_get_singleton;
+extern "C" GDExtensionInterfaceObjectGetInstanceBinding gdextension_interface_object_get_instance_binding;
+extern "C" GDExtensionInterfaceObjectSetInstanceBinding gdextension_interface_object_set_instance_binding;
+extern "C" GDExtensionInterfaceObjectSetInstance gdextension_interface_object_set_instance;
+extern "C" GDExtensionInterfaceObjectGetClassName gdextension_interface_object_get_class_name;
+extern "C" GDExtensionInterfaceObjectCastTo gdextension_interface_object_cast_to;
+extern "C" GDExtensionInterfaceObjectGetInstanceFromId gdextension_interface_object_get_instance_from_id;
+extern "C" GDExtensionInterfaceObjectGetInstanceId gdextension_interface_object_get_instance_id;
+extern "C" GDExtensionInterfaceCallableCustomCreate gdextension_interface_callable_custom_create;
+extern "C" GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata;
+extern "C" GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object;
+extern "C" GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object;
+extern "C" GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2;
+extern "C" GDExtensionInterfacePlaceHolderScriptInstanceCreate gdextension_interface_placeholder_script_instance_create;
+extern "C" GDExtensionInterfacePlaceHolderScriptInstanceUpdate gdextension_interface_placeholder_script_instance_update;
+extern "C" GDExtensionInterfaceClassdbConstructObject gdextension_interface_classdb_construct_object;
+extern "C" GDExtensionInterfaceClassdbGetMethodBind gdextension_interface_classdb_get_method_bind;
+extern "C" GDExtensionInterfaceClassdbGetClassTag gdextension_interface_classdb_get_class_tag;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClass2 gdextension_interface_classdb_register_extension_class2;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassMethod gdextension_interface_classdb_register_extension_class_method;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassIntegerConstant gdextension_interface_classdb_register_extension_class_integer_constant;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassProperty gdextension_interface_classdb_register_extension_class_property;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassPropertyIndexed gdextension_interface_classdb_register_extension_class_property_indexed;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassPropertyGroup gdextension_interface_classdb_register_extension_class_property_group;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassPropertySubgroup gdextension_interface_classdb_register_extension_class_property_subgroup;
+extern "C" GDExtensionInterfaceClassdbRegisterExtensionClassSignal gdextension_interface_classdb_register_extension_class_signal;
+extern "C" GDExtensionInterfaceClassdbUnregisterExtensionClass gdextension_interface_classdb_unregister_extension_class;
+extern "C" GDExtensionInterfaceGetLibraryPath gdextension_interface_get_library_path;
+extern "C" GDExtensionInterfaceEditorAddPlugin gdextension_interface_editor_add_plugin;
+extern "C" GDExtensionInterfaceEditorRemovePlugin gdextension_interface_editor_remove_plugin;
+
 } // namespace internal
 
 enum ModuleInitializationLevel {
 	MODULE_INITIALIZATION_LEVEL_CORE = GDEXTENSION_INITIALIZATION_CORE,
 	MODULE_INITIALIZATION_LEVEL_SERVERS = GDEXTENSION_INITIALIZATION_SERVERS,
 	MODULE_INITIALIZATION_LEVEL_SCENE = GDEXTENSION_INITIALIZATION_SCENE,
-	MODULE_INITIALIZATION_LEVEL_EDITOR = GDEXTENSION_INITIALIZATION_EDITOR
+	MODULE_INITIALIZATION_LEVEL_EDITOR = GDEXTENSION_INITIALIZATION_EDITOR,
+	MODULE_INITIALIZATION_LEVEL_MAX
 };
 
 class GDExtensionBinding {
 public:
 	using Callback = void (*)(ModuleInitializationLevel p_level);
 
-	static Callback init_callback;
-	static Callback terminate_callback;
-	static GDExtensionInitializationLevel minimum_initialization_level;
-	static GDExtensionBool init(const GDExtensionInterface *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization);
+	struct InitData {
+		GDExtensionInitializationLevel minimum_initialization_level = GDEXTENSION_INITIALIZATION_CORE;
+		Callback init_callback = nullptr;
+		Callback terminate_callback = nullptr;
+	};
 
-public:
-	static void initialize_level(void *userdata, GDExtensionInitializationLevel p_level);
-	static void deinitialize_level(void *userdata, GDExtensionInitializationLevel p_level);
-
-	class InitObject {
-		const GDExtensionInterface *gde_interface;
-		GDExtensionClassLibraryPtr library;
-		GDExtensionInitialization *initialization;
+	class InitDataList {
+		int data_count = 0;
+		int data_capacity = 0;
+		InitData **data = nullptr;
 
 	public:
-		InitObject(const GDExtensionInterface *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) :
-				gde_interface(p_interface),
-				library(p_library),
-				initialization(r_initialization) {}
+		void add(InitData *p_cb);
+		~InitDataList();
+	};
+
+	static bool api_initialized;
+	static int level_initialized[MODULE_INITIALIZATION_LEVEL_MAX];
+	static InitDataList initdata;
+	static GDExtensionBool init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, InitData *p_init_data, GDExtensionInitialization *r_initialization);
+
+public:
+	static void initialize_level(void *p_userdata, GDExtensionInitializationLevel p_level);
+	static void deinitialize_level(void *p_userdata, GDExtensionInitializationLevel p_level);
+
+	class InitObject {
+		GDExtensionInterfaceGetProcAddress get_proc_address;
+		GDExtensionClassLibraryPtr library;
+		GDExtensionInitialization *initialization;
+		mutable InitData *init_data = nullptr;
+
+	public:
+		InitObject(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization);
 
 		void register_initializer(Callback p_init) const;
 		void register_terminator(Callback p_init) const;

include/godot_cpp/templates/cowdata.hpp

@@ -32,13 +32,14 @@
 #define GODOT_COWDATA_HPP
 
 #include <godot_cpp/classes/global_constants.hpp>
-#include <godot_cpp/core/class_db.hpp>
 #include <godot_cpp/core/error_macros.hpp>
 #include <godot_cpp/core/math.hpp>
 #include <godot_cpp/core/memory.hpp>
 #include <godot_cpp/templates/safe_refcount.hpp>
 
 #include <cstring>
+#include <new>
+#include <type_traits>
 
 namespace godot {
 
@@ -48,6 +49,9 @@ class Vector;
 template <class T, class V>
 class VMap;
 
+template <class T>
+class CharStringT;
+
 // Silence a false positive warning (see GH-52119).
 #if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic push
@@ -62,6 +66,9 @@ class CowData {
 	template <class TV, class VV>
 	friend class VMap;
 
+	template <class TS>
+	friend class CharStringT;
+
 private:
 	mutable T *_ptr = nullptr;
 
@@ -95,6 +102,10 @@ private:
 	}
 
 	_FORCE_INLINE_ bool _get_alloc_size_checked(size_t p_elements, size_t *out) const {
+		if (unlikely(p_elements == 0)) {
+			*out = 0;
+			return true;
+		}
 #if defined(__GNUC__)
 		size_t o;
 		size_t p;
@@ -106,13 +117,12 @@ private:
 		if (__builtin_add_overflow(o, static_cast<size_t>(32), &p)) {
 			return false; // No longer allocated here.
 		}
-		return true;
 #else
 		// Speed is more important than correctness here, do the operations unchecked
 		// and hope for the best.
 		*out = _get_alloc_size(p_elements);
-		return true;
 #endif
+		return *out;
 	}
 
 	void _unref(void *p_data);
@@ -204,9 +214,9 @@ void CowData<T>::_unref(void *p_data) {
 	if (refc->decrement() > 0) {
 		return; // still in use
 	}
-	// clean up
 
-	if (!__has_trivial_destructor(T)) {
+	// clean up
+	if (!std::is_trivially_destructible<T>::value) {
 		uint32_t *count = _get_size();
 		T *data = (T *)(count + 1);
 
@@ -241,7 +251,7 @@ uint32_t CowData<T>::_copy_on_write() {
 		T *_data = (T *)(mem_new);
 
 		// initialize new elements
-		if (__has_trivial_copy(T)) {
+		if (std::is_trivially_copyable<T>::value) {
 			memcpy(mem_new, _ptr, current_size * sizeof(T));
 
 		} else {
@@ -287,7 +297,7 @@ Error CowData<T>::resize(int p_size) {
 			if (current_size == 0) {
 				// alloc from scratch
 				uint32_t *ptr = (uint32_t *)Memory::alloc_static(alloc_size, true);
-				ERR_FAIL_COND_V(!ptr, ERR_OUT_OF_MEMORY);
+				ERR_FAIL_NULL_V(ptr, ERR_OUT_OF_MEMORY);
 				*(ptr - 1) = 0; // size, currently none
 				new (ptr - 2) SafeNumeric<uint32_t>(1); // refcount
 
@@ -295,7 +305,7 @@ Error CowData<T>::resize(int p_size) {
 
 			} else {
 				uint32_t *_ptrnew = (uint32_t *)Memory::realloc_static(_ptr, alloc_size, true);
-				ERR_FAIL_COND_V(!_ptrnew, ERR_OUT_OF_MEMORY);
+				ERR_FAIL_NULL_V(_ptrnew, ERR_OUT_OF_MEMORY);
 				new (_ptrnew - 2) SafeNumeric<uint32_t>(rc); // refcount
 
 				_ptr = (T *)(_ptrnew);
@@ -304,7 +314,7 @@ Error CowData<T>::resize(int p_size) {
 
 		// construct the newly created elements
 
-		if (!__has_trivial_constructor(T)) {
+		if (!std::is_trivially_constructible<T>::value) {
 			T *elems = _get_data();
 
 			for (int i = *_get_size(); i < p_size; i++) {
@@ -315,7 +325,7 @@ Error CowData<T>::resize(int p_size) {
 		*_get_size() = p_size;
 
 	} else if (p_size < current_size) {
-		if (!__has_trivial_destructor(T)) {
+		if (!std::is_trivially_destructible<T>::value) {
 			// deinitialize no longer needed elements
 			for (uint32_t i = p_size; i < *_get_size(); i++) {
 				T *t = &_get_data()[i];
@@ -325,7 +335,7 @@ Error CowData<T>::resize(int p_size) {
 
 		if (alloc_size != current_alloc_size) {
 			uint32_t *_ptrnew = (uint32_t *)Memory::realloc_static(_ptr, alloc_size, true);
-			ERR_FAIL_COND_V(!_ptrnew, ERR_OUT_OF_MEMORY);
+			ERR_FAIL_NULL_V(_ptrnew, ERR_OUT_OF_MEMORY);
 			new (_ptrnew - 2) SafeNumeric<uint32_t>(rc); // refcount
 
 			_ptr = (T *)(_ptrnew);

include/godot_cpp/templates/list.hpp

@@ -221,7 +221,7 @@ private:
 		int size_cache = 0;
 
 		bool erase(const Element *p_I) {
-			ERR_FAIL_COND_V(!p_I, false);
+			ERR_FAIL_NULL_V(p_I, false);
 			ERR_FAIL_COND_V(p_I->data != this, false);
 
 			if (first == p_I) {

include/godot_cpp/templates/rid_owner.hpp

@@ -186,12 +186,12 @@ public:
 	}
 	void initialize_rid(RID p_rid) {
 		T *mem = get_or_null(p_rid, true);
-		ERR_FAIL_COND(!mem);
+		ERR_FAIL_NULL(mem);
 		memnew_placement(mem, T);
 	}
 	void initialize_rid(RID p_rid, const T &p_value) {
 		T *mem = get_or_null(p_rid, true);
-		ERR_FAIL_COND(!mem);
+		ERR_FAIL_NULL(mem);
 		memnew_placement(mem, T(p_value));
 	}
 
@@ -374,7 +374,7 @@ public:
 
 	_FORCE_INLINE_ void replace(const RID &p_rid, T *p_new_ptr) {
 		T **ptr = alloc.get_or_null(p_rid);
-		ERR_FAIL_COND(!ptr);
+		ERR_FAIL_NULL(ptr);
 		*ptr = p_new_ptr;
 	}
 

include/godot_cpp/templates/thread_work_pool.hpp

@@ -96,7 +96,7 @@ class ThreadWorkPool {
 public:
 	template <class C, class M, class U>
 	void begin_work(uint32_t p_elements, C *p_instance, M p_method, U p_userdata) {
-		ERR_FAIL_COND(!threads); // never initialized
+		ERR_FAIL_NULL(threads); // Never initialized.
 		ERR_FAIL_COND(current_work != nullptr);
 
 		index.store(0, std::memory_order_release);
@@ -123,18 +123,18 @@ public:
 	}
 
 	bool is_done_dispatching() const {
-		ERR_FAIL_COND_V(current_work == nullptr, true);
+		ERR_FAIL_NULL_V(current_work, true);
 		return index.load(std::memory_order_acquire) >= current_work->max_elements;
 	}
 
 	uint32_t get_work_index() const {
-		ERR_FAIL_COND_V(current_work == nullptr, 0);
+		ERR_FAIL_NULL_V(current_work, 0);
 		uint32_t idx = index.load(std::memory_order_acquire);
 		return Math::min(idx, current_work->max_elements);
 	}
 
 	void end_work() {
-		ERR_FAIL_COND(current_work == nullptr);
+		ERR_FAIL_NULL(current_work);
 		for (uint32_t i = 0; i < threads_working; i++) {
 			threads[i].completed.wait();
 			threads[i].work = nullptr;

include/godot_cpp/variant/callable_custom.hpp

@@ -0,0 +1,64 @@
+/**************************************************************************/
+/*  callable_custom.hpp                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_CALLABLE_CUSTOM_HPP
+#define GODOT_CALLABLE_CUSTOM_HPP
+
+#include <godot_cpp/core/object_id.hpp>
+#include <godot_cpp/variant/string_name.hpp>
+
+namespace godot {
+
+class Object;
+
+class CallableCustomBase {
+public:
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+	virtual ~CallableCustomBase() {}
+};
+
+class CallableCustom : public CallableCustomBase {
+public:
+	typedef bool (*CompareEqualFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+	typedef bool (*CompareLessFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+
+	virtual uint32_t hash() const = 0;
+	virtual String get_as_text() const = 0;
+	virtual CompareEqualFunc get_compare_equal_func() const = 0;
+	virtual CompareLessFunc get_compare_less_func() const = 0;
+	virtual bool is_valid() const;
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+};
+
+} // namespace godot
+
+#endif // GODOT_CALLABLE_CUSTOM_HPP

include/godot_cpp/variant/callable_method_pointer.hpp

@@ -0,0 +1,248 @@
+/**************************************************************************/
+/*  callable_method_pointer.hpp                                           */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_CALLABLE_METHOD_POINTER_HPP
+#define GODOT_CALLABLE_METHOD_POINTER_HPP
+
+#include <godot_cpp/core/binder_common.hpp>
+#include <godot_cpp/variant/variant.hpp>
+
+namespace godot {
+
+class CallableCustomMethodPointerBase : public CallableCustomBase {
+	uint32_t *comp_ptr = nullptr;
+	uint32_t comp_size;
+	uint32_t h;
+
+protected:
+	void _setup(uint32_t *p_base_ptr, uint32_t p_ptr_size);
+
+public:
+	_FORCE_INLINE_ const uint32_t *get_comp_ptr() const { return comp_ptr; }
+	_FORCE_INLINE_ uint32_t get_comp_size() const { return comp_size; }
+	_FORCE_INLINE_ uint32_t get_hash() const { return h; }
+};
+
+namespace internal {
+
+Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer);
+
+} // namespace internal
+
+//
+// No return value.
+//
+
+template <class T, class... P>
+class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
+	struct Data {
+		T *instance;
+		void (T::*method)(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
+
+public:
+	virtual ObjectID get_object() const override {
+		return ObjectID(data.instance->get_instance_id());
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
+		call_with_variant_args(data.instance, data.method, p_arguments, p_argcount, r_call_error);
+	}
+
+	CallableCustomMethodPointer(T *p_instance, void (T::*p_method)(P...)) {
+		memset(&data, 0, sizeof(Data));
+		data.instance = p_instance;
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
+	}
+};
+
+template <class T, class... P>
+Callable create_custom_callable_function_pointer(T *p_instance, void (T::*p_method)(P...)) {
+	typedef CallableCustomMethodPointer<T, P...> CCMP;
+	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
+}
+
+//
+// With return value.
+//
+
+template <class T, class R, class... P>
+class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
+	struct Data {
+		T *instance;
+		R(T::*method)
+		(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
+
+public:
+	virtual ObjectID get_object() const override {
+		return ObjectID(data.instance->get_instance_id());
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
+		call_with_variant_args_ret(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
+	}
+
+	CallableCustomMethodPointerRet(T *p_instance, R (T::*p_method)(P...)) {
+		memset(&data, 0, sizeof(Data));
+		data.instance = p_instance;
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
+	}
+};
+
+template <class T, class R, class... P>
+Callable create_custom_callable_function_pointer(T *p_instance, R (T::*p_method)(P...)) {
+	typedef CallableCustomMethodPointerRet<T, R, P...> CCMP; // Messes with memnew otherwise.
+	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
+}
+
+//
+// Const with return value.
+//
+
+template <class T, class R, class... P>
+class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
+	struct Data {
+		T *instance;
+		R(T::*method)
+		(P...) const;
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
+
+public:
+	virtual ObjectID get_object() const override {
+		return ObjectID(data.instance->get_instance_id());
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
+		call_with_variant_args_retc(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
+	}
+
+	CallableCustomMethodPointerRetC(const T *p_instance, R (T::*p_method)(P...) const) {
+		memset(&data, 0, sizeof(Data));
+		data.instance = const_cast<T *>(p_instance);
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
+	}
+};
+
+template <class T, class R, class... P>
+Callable create_custom_callable_function_pointer(const T *p_instance, R (T::*p_method)(P...) const) {
+	typedef CallableCustomMethodPointerRetC<T, R, P...> CCMP; // Messes with memnew otherwise.
+	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
+}
+
+//
+// Static method with no return value.
+//
+
+template <class... P>
+class CallableCustomStaticMethodPointer : public CallableCustomMethodPointerBase {
+	struct Data {
+		void (*method)(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
+
+public:
+	virtual ObjectID get_object() const override {
+		return ObjectID();
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
+		call_with_variant_args_static_ret(data.method, p_arguments, p_argcount, r_return_value, r_call_error);
+		r_return_value = Variant();
+	}
+
+	CallableCustomStaticMethodPointer(void (*p_method)(P...)) {
+		memset(&data, 0, sizeof(Data));
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
+	}
+};
+
+template <class... P>
+Callable create_custom_callable_static_function_pointer(void (*p_method)(P...)) {
+	typedef CallableCustomStaticMethodPointer<P...> CCMP;
+	CCMP *ccmp = memnew(CCMP(p_method));
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
+}
+
+//
+// Static method with return value.
+//
+
+template <class R, class... P>
+class CallableCustomStaticMethodPointerRet : public CallableCustomMethodPointerBase {
+	struct Data {
+		R(*method)
+		(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
+
+public:
+	virtual ObjectID get_object() const override {
+		return ObjectID();
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
+		call_with_variant_args_static_ret(data.method, p_arguments, p_argcount, r_return_value, r_call_error);
+	}
+
+	CallableCustomStaticMethodPointerRet(R (*p_method)(P...)) {
+		memset(&data, 0, sizeof(Data));
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
+	}
+};
+
+template <class R, class... P>
+Callable create_custom_callable_static_function_pointer(R (*p_method)(P...)) {
+	typedef CallableCustomStaticMethodPointerRet<R, P...> CCMP;
+	CCMP *ccmp = memnew(CCMP(p_method));
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
+}
+
+//
+// The API:
+//
+
+#define callable_mp(I, M) ::godot::create_custom_callable_function_pointer(I, M)
+#define callable_mp_static(M) ::godot::create_custom_callable_static_function_pointer(M)
+
+} // namespace godot
+
+#endif // GODOT_CALLABLE_METHOD_POINTER_HPP

include/godot_cpp/variant/char_string.hpp

@@ -31,82 +31,111 @@
 #ifndef GODOT_CHAR_STRING_HPP
 #define GODOT_CHAR_STRING_HPP
 
+#include <godot_cpp/templates/cowdata.hpp>
+
 #include <cstddef>
 #include <cstdint>
 
 namespace godot {
 
-class CharString {
-	friend class String;
+template <class T>
+class CharStringT;
 
-	const char *_data = nullptr;
-	int _length = 0;
+template <class T>
+class CharProxy {
+	template <class TS>
+	friend class CharStringT;
 
-	CharString(const char *str, int length);
+	const int _index;
+	CowData<T> &_cowdata;
+	static inline const T _null = 0;
+
+	_FORCE_INLINE_ CharProxy(const int &p_index, CowData<T> &p_cowdata) :
+			_index(p_index),
+			_cowdata(p_cowdata) {}
 
 public:
-	int length() const;
-	const char *get_data() const;
+	_FORCE_INLINE_ CharProxy(const CharProxy<T> &p_other) :
+			_index(p_other._index),
+			_cowdata(p_other._cowdata) {}
 
-	CharString(CharString &&p_str);
-	void operator=(CharString &&p_str);
-	CharString() {}
-	~CharString();
+	_FORCE_INLINE_ operator T() const {
+		if (unlikely(_index == _cowdata.size())) {
+			return _null;
+		}
+
+		return _cowdata.get(_index);
+	}
+
+	_FORCE_INLINE_ const T *operator&() const {
+		return _cowdata.ptr() + _index;
+	}
+
+	_FORCE_INLINE_ void operator=(const T &p_other) const {
+		_cowdata.set(_index, p_other);
+	}
+
+	_FORCE_INLINE_ void operator=(const CharProxy<T> &p_other) const {
+		_cowdata.set(_index, p_other.operator T());
+	}
 };
 
-class Char16String {
+template <class T>
+class CharStringT {
 	friend class String;
 
-	const char16_t *_data = nullptr;
-	int _length = 0;
-
-	Char16String(const char16_t *str, int length);
+	CowData<T> _cowdata;
+	static inline const T _null = 0;
 
 public:
-	int length() const;
-	const char16_t *get_data() const;
+	_FORCE_INLINE_ T *ptrw() { return _cowdata.ptrw(); }
+	_FORCE_INLINE_ const T *ptr() const { return _cowdata.ptr(); }
+	_FORCE_INLINE_ int size() const { return _cowdata.size(); }
+	Error resize(int p_size) { return _cowdata.resize(p_size); }
 
-	Char16String(Char16String &&p_str);
-	void operator=(Char16String &&p_str);
-	Char16String() {}
-	~Char16String();
+	_FORCE_INLINE_ T get(int p_index) const { return _cowdata.get(p_index); }
+	_FORCE_INLINE_ void set(int p_index, const T &p_elem) { _cowdata.set(p_index, p_elem); }
+	_FORCE_INLINE_ const T &operator[](int p_index) const {
+		if (unlikely(p_index == _cowdata.size())) {
+			return _null;
+		}
+
+		return _cowdata.get(p_index);
+	}
+	_FORCE_INLINE_ CharProxy<T> operator[](int p_index) { return CharProxy<T>(p_index, _cowdata); }
+
+	_FORCE_INLINE_ CharStringT() {}
+	_FORCE_INLINE_ CharStringT(const CharStringT<T> &p_str) { _cowdata._ref(p_str._cowdata); }
+	_FORCE_INLINE_ void operator=(const CharStringT<T> &p_str) { _cowdata._ref(p_str._cowdata); }
+	_FORCE_INLINE_ CharStringT(const T *p_cstr) { copy_from(p_cstr); }
+
+	void operator=(const T *p_cstr);
+	bool operator<(const CharStringT<T> &p_right) const;
+	CharStringT<T> &operator+=(T p_char);
+	int length() const { return size() ? size() - 1 : 0; }
+	const T *get_data() const;
+	operator const T *() const { return get_data(); };
+
+protected:
+	void copy_from(const T *p_cstr);
 };
 
-class Char32String {
-	friend class String;
+template <>
+const char *CharStringT<char>::get_data() const;
 
-	const char32_t *_data = nullptr;
-	int _length = 0;
+template <>
+const char16_t *CharStringT<char16_t>::get_data() const;
 
-	Char32String(const char32_t *str, int length);
+template <>
+const char32_t *CharStringT<char32_t>::get_data() const;
 
-public:
-	int length() const;
-	const char32_t *get_data() const;
+template <>
+const wchar_t *CharStringT<wchar_t>::get_data() const;
 
-	Char32String(Char32String &&p_str);
-	void operator=(Char32String &&p_str);
-	Char32String() {}
-	~Char32String();
-};
-
-class CharWideString {
-	friend class String;
-
-	const wchar_t *_data = nullptr;
-	int _length = 0;
-
-	CharWideString(const wchar_t *str, int length);
-
-public:
-	int length() const;
-	const wchar_t *get_data() const;
-
-	CharWideString(CharWideString &&p_str);
-	void operator=(CharWideString &&p_str);
-	CharWideString() {}
-	~CharWideString();
-};
+typedef CharStringT<char> CharString;
+typedef CharStringT<char16_t> Char16String;
+typedef CharStringT<char32_t> Char32String;
+typedef CharStringT<wchar_t> CharWideString;
 
 } // namespace godot
 

include/godot_cpp/variant/variant.hpp

@@ -154,10 +154,18 @@ public:
 	Variant(int64_t v);
 	Variant(int32_t v) :
 			Variant(static_cast<int64_t>(v)) {}
-	Variant(uint32_t v) :
+	Variant(int16_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(int8_t v) :
 			Variant(static_cast<int64_t>(v)) {}
 	Variant(uint64_t v) :
 			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint32_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint16_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint8_t v) :
+			Variant(static_cast<int64_t>(v)) {}
 	Variant(double v);
 	Variant(float v) :
 			Variant((double)v) {}
@@ -209,8 +217,12 @@ public:
 	operator bool() const;
 	operator int64_t() const;
 	operator int32_t() const;
+	operator int16_t() const;
+	operator int8_t() const;
 	operator uint64_t() const;
 	operator uint32_t() const;
+	operator uint16_t() const;
+	operator uint8_t() const;
 	operator double() const;
 	operator float() const;
 	operator String() const;
@@ -255,25 +267,33 @@ public:
 	bool operator!=(const Variant &other) const;
 	bool operator<(const Variant &other) const;
 
-	void call(const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error);
+	void callp(const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error);
 
 	template <class... Args>
 	Variant call(const StringName &method, Args... args) {
+		std::array<Variant, sizeof...(args)> vargs = { args... };
+		std::array<const Variant *, sizeof...(args)> argptrs;
+		for (size_t i = 0; i < vargs.size(); i++) {
+			argptrs[i] = &vargs[i];
+		}
 		Variant result;
 		GDExtensionCallError error;
-		std::array<GDExtensionConstVariantPtr, sizeof...(Args)> call_args = { Variant(args)... };
-		call(method, call_args.data(), call_args.size(), result, error);
+		callp(method, argptrs.data(), argptrs.size(), result, error);
 		return result;
 	}
 
-	static void call_static(Variant::Type type, const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error);
+	static void callp_static(Variant::Type type, const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error);
 
 	template <class... Args>
 	static Variant call_static(Variant::Type type, const StringName &method, Args... args) {
+		std::array<Variant, sizeof...(args)> vargs = { args... };
+		std::array<const Variant *, sizeof...(args)> argptrs;
+		for (size_t i = 0; i < vargs.size(); i++) {
+			argptrs[i] = &vargs[i];
+		}
 		Variant result;
 		GDExtensionCallError error;
-		std::array<GDExtensionConstVariantPtr, sizeof...(Args)> call_args = { Variant(args)... };
-		call_static(type, method, call_args.data(), call_args.size(), result, error);
+		callp_static(type, method, argptrs.data(), argptrs.size(), sizeof...(args), result, error);
 		return result;
 	}
 
@@ -334,6 +354,8 @@ String vformat(const String &p_text, const VarArgs... p_args) {
 	return p_text % args_array;
 }
 
+#include <godot_cpp/variant/builtin_vararg_methods.hpp>
+
 } // namespace godot
 
 #endif // GODOT_VARIANT_HPP

include/godot_cpp/variant/vector3.hpp

@@ -78,6 +78,14 @@ struct _NO_DISCARD_ Vector3 {
 		return x < y ? (y < z ? Vector3::AXIS_Z : Vector3::AXIS_Y) : (x < z ? Vector3::AXIS_Z : Vector3::AXIS_X);
 	}
 
+	Vector3 min(const Vector3 &p_vector3) const {
+		return Vector3(MIN(x, p_vector3.x), MIN(y, p_vector3.y), MIN(z, p_vector3.z));
+	}
+
+	Vector3 max(const Vector3 &p_vector3) const {
+		return Vector3(MAX(x, p_vector3.x), MAX(y, p_vector3.y), MAX(z, p_vector3.z));
+	}
+
 	_FORCE_INLINE_ real_t length() const;
 	_FORCE_INLINE_ real_t length_squared() const;
 

include/godot_cpp/variant/vector3i.hpp

@@ -71,6 +71,14 @@ struct _NO_DISCARD_ Vector3i {
 	Vector3i::Axis min_axis_index() const;
 	Vector3i::Axis max_axis_index() const;
 
+	Vector3i min(const Vector3i &p_vector3i) const {
+		return Vector3i(MIN(x, p_vector3i.x), MIN(y, p_vector3i.y), MIN(z, p_vector3i.z));
+	}
+
+	Vector3i max(const Vector3i &p_vector3i) const {
+		return Vector3i(MAX(x, p_vector3i.x), MAX(y, p_vector3i.y), MAX(z, p_vector3i.z));
+	}
+
 	_FORCE_INLINE_ int64_t length_squared() const;
 	_FORCE_INLINE_ double length() const;
 

include/godot_cpp/variant/vector4.hpp

@@ -70,6 +70,14 @@ struct _NO_DISCARD_ Vector4 {
 	Vector4::Axis min_axis_index() const;
 	Vector4::Axis max_axis_index() const;
 
+	Vector4 min(const Vector4 &p_vector4) const {
+		return Vector4(MIN(x, p_vector4.x), MIN(y, p_vector4.y), MIN(z, p_vector4.z), MIN(w, p_vector4.w));
+	}
+
+	Vector4 max(const Vector4 &p_vector4) const {
+		return Vector4(MAX(x, p_vector4.x), MAX(y, p_vector4.y), MAX(z, p_vector4.z), MAX(w, p_vector4.w));
+	}
+
 	_FORCE_INLINE_ real_t length_squared() const;
 	bool is_equal_approx(const Vector4 &p_vec4) const;
 	bool is_zero_approx() const;

include/godot_cpp/variant/vector4i.hpp

@@ -73,6 +73,14 @@ struct _NO_DISCARD_ Vector4i {
 	Vector4i::Axis min_axis_index() const;
 	Vector4i::Axis max_axis_index() const;
 
+	Vector4i min(const Vector4i &p_vector4i) const {
+		return Vector4i(MIN(x, p_vector4i.x), MIN(y, p_vector4i.y), MIN(z, p_vector4i.z), MIN(w, p_vector4i.w));
+	}
+
+	Vector4i max(const Vector4i &p_vector4i) const {
+		return Vector4i(MAX(x, p_vector4i.x), MAX(y, p_vector4i.y), MAX(z, p_vector4i.z), MAX(w, p_vector4i.w));
+	}
+
 	_FORCE_INLINE_ int64_t length_squared() const;
 	_FORCE_INLINE_ double length() const;
 

src/classes/editor_plugin_registration.cpp

@@ -0,0 +1,61 @@
+/**************************************************************************/
+/*  editor_plugin_registration.cpp                                        */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include <godot_cpp/classes/editor_plugin_registration.hpp>
+
+#include <godot_cpp/variant/variant.hpp>
+
+namespace godot {
+
+Vector<StringName> EditorPlugins::plugin_classes;
+
+void EditorPlugins::add_plugin_class(const StringName &p_class_name) {
+	ERR_FAIL_COND_MSG(plugin_classes.find(p_class_name) != -1, vformat("Editor plugin already registered: %s", p_class_name));
+	plugin_classes.push_back(p_class_name);
+	internal::gdextension_interface_editor_add_plugin(p_class_name._native_ptr());
+}
+
+void EditorPlugins::remove_plugin_class(const StringName &p_class_name) {
+	int index = plugin_classes.find(p_class_name);
+	ERR_FAIL_COND_MSG(index == -1, vformat("Editor plugin is not registered: %s", p_class_name));
+	plugin_classes.remove_at(index);
+	internal::gdextension_interface_editor_remove_plugin(p_class_name._native_ptr());
+}
+
+void EditorPlugins::deinitialize(GDExtensionInitializationLevel p_level) {
+	if (p_level == GDEXTENSION_INITIALIZATION_EDITOR) {
+		for (const StringName &class_name : plugin_classes) {
+			internal::gdextension_interface_editor_remove_plugin(class_name._native_ptr());
+		}
+		plugin_classes.clear();
+	}
+}
+
+} // namespace godot

src/classes/low_level.cpp

@@ -36,23 +36,23 @@
 
 namespace godot {
 Error XMLParser::_open_buffer(const uint8_t *p_buffer, size_t p_size) {
-	return (Error)internal::gde_interface->xml_parser_open_buffer(_owner, p_buffer, p_size);
+	return (Error)internal::gdextension_interface_xml_parser_open_buffer(_owner, p_buffer, p_size);
 }
 
 uint64_t FileAccess::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
-	return internal::gde_interface->file_access_get_buffer(_owner, p_dst, p_length);
+	return internal::gdextension_interface_file_access_get_buffer(_owner, p_dst, p_length);
 }
 
 void FileAccess::store_buffer(const uint8_t *p_src, uint64_t p_length) {
-	internal::gde_interface->file_access_store_buffer(_owner, p_src, p_length);
+	internal::gdextension_interface_file_access_store_buffer(_owner, p_src, p_length);
 }
 
 WorkerThreadPool::TaskID WorkerThreadPool::add_native_task(void (*p_func)(void *), void *p_userdata, bool p_high_priority, const String &p_description) {
-	return (TaskID)internal::gde_interface->worker_thread_pool_add_native_task(_owner, p_func, p_userdata, p_high_priority, (GDExtensionConstStringPtr)&p_description);
+	return (TaskID)internal::gdextension_interface_worker_thread_pool_add_native_task(_owner, p_func, p_userdata, p_high_priority, (GDExtensionConstStringPtr)&p_description);
 }
 
 WorkerThreadPool::GroupID WorkerThreadPool::add_native_group_task(void (*p_func)(void *, uint32_t), void *p_userdata, int p_elements, int p_tasks, bool p_high_priority, const String &p_description) {
-	return (GroupID)internal::gde_interface->worker_thread_pool_add_native_group_task(_owner, p_func, p_userdata, p_elements, p_tasks, p_high_priority, (GDExtensionConstStringPtr)&p_description);
+	return (GroupID)internal::gdextension_interface_worker_thread_pool_add_native_group_task(_owner, p_func, p_userdata, p_elements, p_tasks, p_high_priority, (GDExtensionConstStringPtr)&p_description);
 }
 
 } // namespace godot

src/classes/wrapped.cpp

@@ -28,12 +28,16 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
+#include <vector>
+
 #include <godot_cpp/classes/wrapped.hpp>
 
 #include <godot_cpp/variant/builtin_types.hpp>
 
 #include <godot_cpp/classes/object.hpp>
 
+#include <godot_cpp/core/class_db.hpp>
+
 namespace godot {
 
 const StringName *Wrapped::_get_extension_class_name() const {
@@ -43,13 +47,38 @@ const StringName *Wrapped::_get_extension_class_name() const {
 void Wrapped::_postinitialize() {
 	const StringName *extension_class = _get_extension_class_name();
 	if (extension_class) {
-		godot::internal::gde_interface->object_set_instance(_owner, reinterpret_cast<GDExtensionConstStringNamePtr>(extension_class), this);
+		godot::internal::gdextension_interface_object_set_instance(_owner, reinterpret_cast<GDExtensionConstStringNamePtr>(extension_class), this);
+	}
+	godot::internal::gdextension_interface_object_set_instance_binding(_owner, godot::internal::token, this, _get_bindings_callbacks());
+	if (extension_class) {
+		Object *obj = dynamic_cast<Object *>(this);
+		if (obj) {
+			obj->notification(Object::NOTIFICATION_POSTINITIALIZE);
+		}
 	}
-	godot::internal::gde_interface->object_set_instance_binding(_owner, godot::internal::token, this, _get_bindings_callbacks());
 }
 
 Wrapped::Wrapped(const StringName p_godot_class) {
-	_owner = godot::internal::gde_interface->classdb_construct_object(reinterpret_cast<GDExtensionConstStringNamePtr>(p_godot_class._native_ptr()));
+#ifdef HOT_RELOAD_ENABLED
+	if (unlikely(Wrapped::recreate_instance)) {
+		RecreateInstance *recreate_data = Wrapped::recreate_instance;
+		RecreateInstance *previous = nullptr;
+		while (recreate_data) {
+			if (recreate_data->wrapper == this) {
+				_owner = recreate_data->owner;
+				if (previous) {
+					previous->next = recreate_data->next;
+				} else {
+					Wrapped::recreate_instance = recreate_data->next;
+				}
+				return;
+			}
+			previous = recreate_data;
+			recreate_data = recreate_data->next;
+		}
+	}
+#endif
+	_owner = godot::internal::gdextension_interface_classdb_construct_object(reinterpret_cast<GDExtensionConstStringNamePtr>(p_godot_class._native_ptr()));
 }
 
 Wrapped::Wrapped(GodotObject *p_godot_object) {
@@ -60,4 +89,54 @@ void postinitialize_handler(Wrapped *p_wrapped) {
 	p_wrapped->_postinitialize();
 }
 
+namespace internal {
+
+std::vector<EngineClassRegistrationCallback> &get_engine_class_registration_callbacks() {
+	static std::vector<EngineClassRegistrationCallback> engine_class_registration_callbacks;
+	return engine_class_registration_callbacks;
+}
+
+GDExtensionPropertyInfo *create_c_property_list(const ::godot::List<::godot::PropertyInfo> &plist_cpp, uint32_t *r_size) {
+	GDExtensionPropertyInfo *plist = nullptr;
+	// Linked list size can be expensive to get so we cache it
+	const uint32_t plist_size = plist_cpp.size();
+	if (r_size != nullptr) {
+		*r_size = plist_size;
+	}
+	plist = reinterpret_cast<GDExtensionPropertyInfo *>(memalloc(sizeof(GDExtensionPropertyInfo) * plist_size));
+	unsigned int i = 0;
+	for (const ::godot::PropertyInfo &E : plist_cpp) {
+		plist[i].type = static_cast<GDExtensionVariantType>(E.type);
+		plist[i].name = E.name._native_ptr();
+		plist[i].hint = E.hint;
+		plist[i].hint_string = E.hint_string._native_ptr();
+		plist[i].class_name = E.class_name._native_ptr();
+		plist[i].usage = E.usage;
+		++i;
+	}
+	return plist;
+}
+
+void free_c_property_list(GDExtensionPropertyInfo *plist) {
+	memfree(plist);
+}
+
+void add_engine_class_registration_callback(EngineClassRegistrationCallback p_callback) {
+	get_engine_class_registration_callbacks().push_back(p_callback);
+}
+
+void register_engine_class(const StringName &p_name, const GDExtensionInstanceBindingCallbacks *p_callbacks) {
+	ClassDB::_register_engine_class(p_name, p_callbacks);
+}
+
+void register_engine_classes() {
+	std::vector<EngineClassRegistrationCallback> &engine_class_registration_callbacks = get_engine_class_registration_callbacks();
+	for (EngineClassRegistrationCallback cb : engine_class_registration_callbacks) {
+		cb();
+	}
+	engine_class_registration_callbacks.clear();
+}
+
+} // namespace internal
+
 } // namespace godot

src/core/class_db.cpp

@@ -40,6 +40,8 @@
 namespace godot {
 
 std::unordered_map<StringName, ClassDB::ClassInfo> ClassDB::classes;
+std::unordered_map<StringName, const GDExtensionInstanceBindingCallbacks *> ClassDB::instance_binding_callbacks;
+std::vector<StringName> ClassDB::class_register_order;
 GDExtensionInitializationLevel ClassDB::current_level = GDEXTENSION_INITIALIZATION_CORE;
 
 MethodDefinition D_METHOD(StringName p_name) {
@@ -55,13 +57,13 @@ MethodDefinition D_METHOD(StringName p_name, StringName p_arg1) {
 void ClassDB::add_property_group(const StringName &p_class, const String &p_name, const String &p_prefix) {
 	ERR_FAIL_COND_MSG(classes.find(p_class) == classes.end(), String("Trying to add property '{0}{1}' to non-existing class '{2}'.").format(Array::make(p_prefix, p_name, p_class)));
 
-	internal::gde_interface->classdb_register_extension_class_property_group(internal::library, p_class._native_ptr(), p_name._native_ptr(), p_prefix._native_ptr());
+	internal::gdextension_interface_classdb_register_extension_class_property_group(internal::library, p_class._native_ptr(), p_name._native_ptr(), p_prefix._native_ptr());
 }
 
 void ClassDB::add_property_subgroup(const StringName &p_class, const String &p_name, const String &p_prefix) {
 	ERR_FAIL_COND_MSG(classes.find(p_class) == classes.end(), String("Trying to add property '{0}{1}' to non-existing class '{2}'.").format(Array::make(p_prefix, p_name, p_class)));
 
-	internal::gde_interface->classdb_register_extension_class_property_subgroup(internal::library, p_class._native_ptr(), p_name._native_ptr(), p_prefix._native_ptr());
+	internal::gdextension_interface_classdb_register_extension_class_property_subgroup(internal::library, p_class._native_ptr(), p_name._native_ptr(), p_prefix._native_ptr());
 }
 
 void ClassDB::add_property(const StringName &p_class, const PropertyInfo &p_pinfo, const StringName &p_setter, const StringName &p_getter, int p_index) {
@@ -75,7 +77,7 @@ void ClassDB::add_property(const StringName &p_class, const PropertyInfo &p_pinf
 	if (p_setter != String("")) {
 		setter = get_method(p_class, p_setter);
 
-		ERR_FAIL_COND_MSG(!setter, String("Setter method '{0}::{1}()' not found for property '{2}::{3}'.").format(Array::make(p_class, p_setter, p_class, p_pinfo.name)));
+		ERR_FAIL_NULL_MSG(setter, String("Setter method '{0}::{1}()' not found for property '{2}::{3}'.").format(Array::make(p_class, p_setter, p_class, p_pinfo.name)));
 
 		size_t exp_args = 1 + (p_index >= 0 ? 1 : 0);
 		ERR_FAIL_COND_MSG((int)exp_args != setter->get_argument_count(), String("Setter method '{0}::{1}()' must take a single argument.").format(Array::make(p_class, p_setter)));
@@ -84,7 +86,7 @@ void ClassDB::add_property(const StringName &p_class, const PropertyInfo &p_pinf
 	ERR_FAIL_COND_MSG(p_getter == String(""), String("Getter method must be specified for '{0}::{1}'.").format(Array::make(p_class, p_pinfo.name)));
 
 	MethodBind *getter = get_method(p_class, p_getter);
-	ERR_FAIL_COND_MSG(!getter, String("Getter method '{0}::{1}()' not found for property '{2}::{3}'.").format(Array::make(p_class, p_getter, p_class, p_pinfo.name)));
+	ERR_FAIL_NULL_MSG(getter, String("Getter method '{0}::{1}()' not found for property '{2}::{3}'.").format(Array::make(p_class, p_getter, p_class, p_pinfo.name)));
 	{
 		size_t exp_args = 0 + (p_index >= 0 ? 1 : 0);
 		ERR_FAIL_COND_MSG((int)exp_args != getter->get_argument_count(), String("Getter method '{0}::{1}()' must not take any argument.").format(Array::make(p_class, p_getter)));
@@ -103,15 +105,7 @@ void ClassDB::add_property(const StringName &p_class, const PropertyInfo &p_pinf
 		p_pinfo.usage, // DEFAULT //uint32_t usage;
 	};
 
-	PropertySetGet setget;
-	setget.setter = p_setter;
-	setget.getter = p_getter;
-	setget._setptr = setter;
-	setget._getptr = getter;
-	setget.index = p_index;
-	setget.type = p_pinfo.type;
-
-	internal::gde_interface->classdb_register_extension_class_property(internal::library, info.name._native_ptr(), &prop_info, setget.setter._native_ptr(), setget.getter._native_ptr());
+	internal::gdextension_interface_classdb_register_extension_class_property_indexed(internal::library, info.name._native_ptr(), &prop_info, p_setter._native_ptr(), p_getter._native_ptr(), p_index);
 }
 
 MethodBind *ClassDB::get_method(const StringName &p_class, const StringName &p_method) {
@@ -234,7 +228,7 @@ void ClassDB::bind_method_godot(const StringName &p_class_name, MethodBind *p_me
 		(uint32_t)p_method->get_default_argument_count(), // uint32_t default_argument_count;
 		def_args.data(), // GDExtensionVariantPtr *default_arguments;
 	};
-	internal::gde_interface->classdb_register_extension_class_method(internal::library, p_class_name._native_ptr(), &method_info);
+	internal::gdextension_interface_classdb_register_extension_class_method(internal::library, p_class_name._native_ptr(), &method_info);
 }
 
 void ClassDB::add_signal(const StringName &p_class, const MethodInfo &p_signal) {
@@ -269,7 +263,7 @@ void ClassDB::add_signal(const StringName &p_class, const MethodInfo &p_signal)
 		});
 	}
 
-	internal::gde_interface->classdb_register_extension_class_signal(internal::library, cl.name._native_ptr(), p_signal.name._native_ptr(), parameters.data(), parameters.size());
+	internal::gdextension_interface_classdb_register_extension_class_signal(internal::library, cl.name._native_ptr(), p_signal.name._native_ptr(), parameters.data(), parameters.size());
 }
 
 void ClassDB::bind_integer_constant(const StringName &p_class_name, const StringName &p_enum_name, const StringName &p_constant_name, GDExtensionInt p_constant_value, bool p_is_bitfield) {
@@ -286,7 +280,7 @@ void ClassDB::bind_integer_constant(const StringName &p_class_name, const String
 	type.constant_names.insert(p_constant_name);
 
 	// Register it with Godot
-	internal::gde_interface->classdb_register_extension_class_integer_constant(internal::library, p_class_name._native_ptr(), p_enum_name._native_ptr(), p_constant_name._native_ptr(), p_constant_value, p_is_bitfield);
+	internal::gdextension_interface_classdb_register_extension_class_integer_constant(internal::library, p_class_name._native_ptr(), p_enum_name._native_ptr(), p_constant_name._native_ptr(), p_constant_value, p_is_bitfield);
 }
 GDExtensionClassCallVirtual ClassDB::get_virtual_func(void *p_userdata, GDExtensionConstStringNamePtr p_name) {
 	// This is called by Godot the first time it calls a virtual function, and it caches the result, per object instance.
@@ -314,6 +308,23 @@ GDExtensionClassCallVirtual ClassDB::get_virtual_func(void *p_userdata, GDExtens
 	return nullptr;
 }
 
+const GDExtensionInstanceBindingCallbacks *ClassDB::get_instance_binding_callbacks(const StringName &p_class) {
+	std::unordered_map<StringName, const GDExtensionInstanceBindingCallbacks *>::iterator callbacks_it = instance_binding_callbacks.find(p_class);
+	if (likely(callbacks_it != instance_binding_callbacks.end())) {
+		return callbacks_it->second;
+	}
+
+	// If we don't have an instance binding callback for the given class, find the closest parent where we do.
+	StringName class_name = p_class;
+	do {
+		class_name = get_parent_class(class_name);
+		ERR_FAIL_COND_V_MSG(class_name == StringName(), nullptr, String("Cannot find instance binding callbacks for class '{0}'.").format(Array::make(p_class)));
+		callbacks_it = instance_binding_callbacks.find(class_name);
+	} while (callbacks_it == instance_binding_callbacks.end());
+
+	return callbacks_it->second;
+}
+
 void ClassDB::bind_virtual_method(const StringName &p_class, const StringName &p_method, GDExtensionClassCallVirtual p_call) {
 	std::unordered_map<StringName, ClassInfo>::iterator type_it = classes.find(p_class);
 	ERR_FAIL_COND_MSG(type_it == classes.end(), String("Class '{0}' doesn't exist.").format(Array::make(p_class)));
@@ -341,17 +352,31 @@ void ClassDB::initialize(GDExtensionInitializationLevel p_level) {
 }
 
 void ClassDB::deinitialize(GDExtensionInitializationLevel p_level) {
-	for (const std::pair<StringName, ClassInfo> pair : classes) {
-		const ClassInfo &cl = pair.second;
+	std::set<StringName> to_erase;
+	for (std::vector<StringName>::reverse_iterator i = class_register_order.rbegin(); i != class_register_order.rend(); ++i) {
+		const StringName &name = *i;
+		const ClassInfo &cl = classes[name];
+
 		if (cl.level != p_level) {
 			continue;
 		}
 
-		internal::gde_interface->classdb_unregister_extension_class(internal::library, cl.name._native_ptr());
+		internal::gdextension_interface_classdb_unregister_extension_class(internal::library, name._native_ptr());
 
-		for (auto method : cl.method_map) {
+		for (const std::pair<const StringName, MethodBind *> &method : cl.method_map) {
 			memdelete(method.second);
 		}
+
+		classes.erase(name);
+		to_erase.insert(name);
+	}
+
+	{
+		// The following is equivalent to c++20 `std::erase_if(class_register_order, [&](const StringName& name){ return to_erase.contains(name); });`
+		std::vector<StringName>::iterator it = std::remove_if(class_register_order.begin(), class_register_order.end(), [&](const StringName &p_name) {
+			return to_erase.count(p_name) > 0;
+		});
+		class_register_order.erase(it, class_register_order.end());
 	}
 }
 

src/core/error_macros.cpp

@@ -39,9 +39,9 @@ namespace godot {
 
 void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, bool p_editor_notify, bool p_is_warning) {
 	if (p_is_warning) {
-		internal::gde_interface->print_warning(p_error, p_function, p_file, p_line, p_editor_notify);
+		internal::gdextension_interface_print_warning(p_error, p_function, p_file, p_line, p_editor_notify);
 	} else {
-		internal::gde_interface->print_error(p_error, p_function, p_file, p_line, p_editor_notify);
+		internal::gdextension_interface_print_error(p_error, p_function, p_file, p_line, p_editor_notify);
 	}
 }
 
@@ -51,9 +51,9 @@ void _err_print_error(const char *p_function, const char *p_file, int p_line, co
 
 void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, const char *p_message, bool p_editor_notify, bool p_is_warning) {
 	if (p_is_warning) {
-		internal::gde_interface->print_warning_with_message(p_error, p_message, p_function, p_file, p_line, p_editor_notify);
+		internal::gdextension_interface_print_warning_with_message(p_error, p_message, p_function, p_file, p_line, p_editor_notify);
 	} else {
-		internal::gde_interface->print_error_with_message(p_error, p_message, p_function, p_file, p_line, p_editor_notify);
+		internal::gdextension_interface_print_error_with_message(p_error, p_message, p_function, p_file, p_line, p_editor_notify);
 	}
 }
 

src/core/memory.cpp

@@ -41,8 +41,8 @@ void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
 	bool prepad = p_pad_align;
 #endif
 
-	void *mem = internal::gde_interface->mem_alloc(p_bytes + (prepad ? PAD_ALIGN : 0));
-	ERR_FAIL_COND_V(!mem, nullptr);
+	void *mem = internal::gdextension_interface_mem_alloc(p_bytes + (prepad ? PAD_ALIGN : 0));
+	ERR_FAIL_NULL_V(mem, nullptr);
 
 	if (prepad) {
 		uint8_t *s8 = (uint8_t *)mem;
@@ -70,11 +70,11 @@ void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
 
 	if (prepad) {
 		mem -= PAD_ALIGN;
-		mem = (uint8_t *)internal::gde_interface->mem_realloc(mem, p_bytes + PAD_ALIGN);
-		ERR_FAIL_COND_V(!mem, nullptr);
+		mem = (uint8_t *)internal::gdextension_interface_mem_realloc(mem, p_bytes + PAD_ALIGN);
+		ERR_FAIL_NULL_V(mem, nullptr);
 		return mem + PAD_ALIGN;
 	} else {
-		return (uint8_t *)internal::gde_interface->mem_realloc(mem, p_bytes);
+		return (uint8_t *)internal::gdextension_interface_mem_realloc(mem, p_bytes);
 	}
 }
 
@@ -90,7 +90,7 @@ void Memory::free_static(void *p_ptr, bool p_pad_align) {
 	if (prepad) {
 		mem -= PAD_ALIGN;
 	}
-	internal::gde_interface->mem_free(mem);
+	internal::gdextension_interface_mem_free(mem);
 }
 
 _GlobalNil::_GlobalNil() {
@@ -103,28 +103,29 @@ _GlobalNil _GlobalNilClass::_nil;
 
 } // namespace godot
 
-void *operator new(size_t p_size, const char *p_description) {
+// p_dummy argument is added to avoid conflicts with the engine functions when both engine and GDExtension are built as a static library on iOS.
+void *operator new(size_t p_size, const char *p_dummy, const char *p_description) {
 	return godot::Memory::alloc_static(p_size);
 }
 
-void *operator new(size_t p_size, void *(*p_allocfunc)(size_t p_size)) {
+void *operator new(size_t p_size, const char *p_dummy, void *(*p_allocfunc)(size_t p_size)) {
 	return p_allocfunc(p_size);
 }
 
 using namespace godot;
 
 #ifdef _MSC_VER
-void operator delete(void *p_mem, const char *p_description) {
+void operator delete(void *p_mem, const char *p_dummy, const char *p_description) {
 	ERR_PRINT("Call to placement delete should not happen.");
 	CRASH_NOW();
 }
 
-void operator delete(void *p_mem, void *(*p_allocfunc)(size_t p_size)) {
+void operator delete(void *p_mem, const char *p_dummy, void *(*p_allocfunc)(size_t p_size)) {
 	ERR_PRINT("Call to placement delete should not happen.");
 	CRASH_NOW();
 }
 
-void operator delete(void *p_mem, void *p_pointer, size_t check, const char *p_description) {
+void operator delete(void *p_mem, const char *p_dummy, void *p_pointer, size_t check, const char *p_description) {
 	ERR_PRINT("Call to placement delete should not happen.");
 	CRASH_NOW();
 }

src/core/method_bind.cpp

@@ -96,7 +96,7 @@ void MethodBind::bind_call(void *p_method_userdata, GDExtensionClassInstancePtr
 	Variant ret = bind->call(p_instance, p_args, p_argument_count, *r_error);
 	// This assumes the return value is an empty Variant, so it doesn't need to call the destructor first.
 	// Since only GDExtensionMethodBind calls this from the Godot side, it should always be the case.
-	internal::gde_interface->variant_new_copy(r_return, ret._native_ptr());
+	internal::gdextension_interface_variant_new_copy(r_return, ret._native_ptr());
 }
 
 void MethodBind::bind_ptrcall(void *p_method_userdata, GDExtensionClassInstancePtr p_instance, const GDExtensionConstTypePtr *p_args, GDExtensionTypePtr r_return) {

src/core/object.cpp

@@ -30,8 +30,38 @@
 
 #include <godot_cpp/core/object.hpp>
 
+#include <godot_cpp/core/class_db.hpp>
+
 namespace godot {
 
+namespace internal {
+
+Object *get_object_instance_binding(GodotObject *p_engine_object) {
+	if (p_engine_object == nullptr) {
+		return nullptr;
+	}
+
+	// Get existing instance binding, if one already exists.
+	GDExtensionObjectPtr instance = gdextension_interface_object_get_instance_binding(p_engine_object, token, nullptr);
+	if (instance != nullptr) {
+		return reinterpret_cast<Object *>(instance);
+	}
+
+	// Otherwise, try to look up the correct binding callbacks.
+	const GDExtensionInstanceBindingCallbacks *binding_callbacks = nullptr;
+	StringName class_name;
+	if (gdextension_interface_object_get_class_name(p_engine_object, library, reinterpret_cast<GDExtensionStringNamePtr>(class_name._native_ptr()))) {
+		binding_callbacks = ClassDB::get_instance_binding_callbacks(class_name);
+	}
+	if (binding_callbacks == nullptr) {
+		binding_callbacks = &Object::_gde_binding_callbacks;
+	}
+
+	return reinterpret_cast<Object *>(gdextension_interface_object_get_instance_binding(p_engine_object, token, binding_callbacks));
+}
+
+} // namespace internal
+
 MethodInfo::MethodInfo() :
 		flags(GDEXTENSION_METHOD_FLAG_NORMAL) {}
 

src/godot.cpp

@@ -30,9 +30,11 @@
 
 #include <godot_cpp/godot.hpp>
 
+#include <godot_cpp/classes/editor_plugin_registration.hpp>
 #include <godot_cpp/classes/wrapped.hpp>
 #include <godot_cpp/core/class_db.hpp>
 #include <godot_cpp/core/memory.hpp>
+#include <godot_cpp/core/version.hpp>
 #include <godot_cpp/variant/variant.hpp>
 
 #include <godot_cpp/core/error_macros.hpp>
@@ -41,77 +43,481 @@ namespace godot {
 
 namespace internal {
 
-const GDExtensionInterface *gde_interface = nullptr;
+GDExtensionInterfaceGetProcAddress gdextension_interface_get_proc_address = nullptr;
 GDExtensionClassLibraryPtr library = nullptr;
 void *token = nullptr;
 
+GDExtensionGodotVersion godot_version = { 0, 0, 0, nullptr };
+
+// All of the GDExtension interface functions.
+GDExtensionInterfaceGetGodotVersion gdextension_interface_get_godot_version = nullptr;
+GDExtensionInterfaceMemAlloc gdextension_interface_mem_alloc = nullptr;
+GDExtensionInterfaceMemRealloc gdextension_interface_mem_realloc = nullptr;
+GDExtensionInterfaceMemFree gdextension_interface_mem_free = nullptr;
+GDExtensionInterfacePrintError gdextension_interface_print_error = nullptr;
+GDExtensionInterfacePrintErrorWithMessage gdextension_interface_print_error_with_message = nullptr;
+GDExtensionInterfacePrintWarning gdextension_interface_print_warning = nullptr;
+GDExtensionInterfacePrintWarningWithMessage gdextension_interface_print_warning_with_message = nullptr;
+GDExtensionInterfacePrintScriptError gdextension_interface_print_script_error = nullptr;
+GDExtensionInterfacePrintScriptErrorWithMessage gdextension_interface_print_script_error_with_message = nullptr;
+GDExtensionInterfaceGetNativeStructSize gdextension_interface_get_native_struct_size = nullptr;
+GDExtensionInterfaceVariantNewCopy gdextension_interface_variant_new_copy = nullptr;
+GDExtensionInterfaceVariantNewNil gdextension_interface_variant_new_nil = nullptr;
+GDExtensionInterfaceVariantDestroy gdextension_interface_variant_destroy = nullptr;
+GDExtensionInterfaceVariantCall gdextension_interface_variant_call = nullptr;
+GDExtensionInterfaceVariantCallStatic gdextension_interface_variant_call_static = nullptr;
+GDExtensionInterfaceVariantEvaluate gdextension_interface_variant_evaluate = nullptr;
+GDExtensionInterfaceVariantSet gdextension_interface_variant_set = nullptr;
+GDExtensionInterfaceVariantSetNamed gdextension_interface_variant_set_named = nullptr;
+GDExtensionInterfaceVariantSetKeyed gdextension_interface_variant_set_keyed = nullptr;
+GDExtensionInterfaceVariantSetIndexed gdextension_interface_variant_set_indexed = nullptr;
+GDExtensionInterfaceVariantGet gdextension_interface_variant_get = nullptr;
+GDExtensionInterfaceVariantGetNamed gdextension_interface_variant_get_named = nullptr;
+GDExtensionInterfaceVariantGetKeyed gdextension_interface_variant_get_keyed = nullptr;
+GDExtensionInterfaceVariantGetIndexed gdextension_interface_variant_get_indexed = nullptr;
+GDExtensionInterfaceVariantIterInit gdextension_interface_variant_iter_init = nullptr;
+GDExtensionInterfaceVariantIterNext gdextension_interface_variant_iter_next = nullptr;
+GDExtensionInterfaceVariantIterGet gdextension_interface_variant_iter_get = nullptr;
+GDExtensionInterfaceVariantHash gdextension_interface_variant_hash = nullptr;
+GDExtensionInterfaceVariantRecursiveHash gdextension_interface_variant_recursive_hash = nullptr;
+GDExtensionInterfaceVariantHashCompare gdextension_interface_variant_hash_compare = nullptr;
+GDExtensionInterfaceVariantBooleanize gdextension_interface_variant_booleanize = nullptr;
+GDExtensionInterfaceVariantDuplicate gdextension_interface_variant_duplicate = nullptr;
+GDExtensionInterfaceVariantStringify gdextension_interface_variant_stringify = nullptr;
+GDExtensionInterfaceVariantGetType gdextension_interface_variant_get_type = nullptr;
+GDExtensionInterfaceVariantHasMethod gdextension_interface_variant_has_method = nullptr;
+GDExtensionInterfaceVariantHasMember gdextension_interface_variant_has_member = nullptr;
+GDExtensionInterfaceVariantHasKey gdextension_interface_variant_has_key = nullptr;
+GDExtensionInterfaceVariantGetTypeName gdextension_interface_variant_get_type_name = nullptr;
+GDExtensionInterfaceVariantCanConvert gdextension_interface_variant_can_convert = nullptr;
+GDExtensionInterfaceVariantCanConvertStrict gdextension_interface_variant_can_convert_strict = nullptr;
+GDExtensionInterfaceGetVariantFromTypeConstructor gdextension_interface_get_variant_from_type_constructor = nullptr;
+GDExtensionInterfaceGetVariantToTypeConstructor gdextension_interface_get_variant_to_type_constructor = nullptr;
+GDExtensionInterfaceVariantGetPtrOperatorEvaluator gdextension_interface_variant_get_ptr_operator_evaluator = nullptr;
+GDExtensionInterfaceVariantGetPtrBuiltinMethod gdextension_interface_variant_get_ptr_builtin_method = nullptr;
+GDExtensionInterfaceVariantGetPtrConstructor gdextension_interface_variant_get_ptr_constructor = nullptr;
+GDExtensionInterfaceVariantGetPtrDestructor gdextension_interface_variant_get_ptr_destructor = nullptr;
+GDExtensionInterfaceVariantConstruct gdextension_interface_variant_construct = nullptr;
+GDExtensionInterfaceVariantGetPtrSetter gdextension_interface_variant_get_ptr_setter = nullptr;
+GDExtensionInterfaceVariantGetPtrGetter gdextension_interface_variant_get_ptr_getter = nullptr;
+GDExtensionInterfaceVariantGetPtrIndexedSetter gdextension_interface_variant_get_ptr_indexed_setter = nullptr;
+GDExtensionInterfaceVariantGetPtrIndexedGetter gdextension_interface_variant_get_ptr_indexed_getter = nullptr;
+GDExtensionInterfaceVariantGetPtrKeyedSetter gdextension_interface_variant_get_ptr_keyed_setter = nullptr;
+GDExtensionInterfaceVariantGetPtrKeyedGetter gdextension_interface_variant_get_ptr_keyed_getter = nullptr;
+GDExtensionInterfaceVariantGetPtrKeyedChecker gdextension_interface_variant_get_ptr_keyed_checker = nullptr;
+GDExtensionInterfaceVariantGetConstantValue gdextension_interface_variant_get_constant_value = nullptr;
+GDExtensionInterfaceVariantGetPtrUtilityFunction gdextension_interface_variant_get_ptr_utility_function = nullptr;
+GDExtensionInterfaceStringNewWithLatin1Chars gdextension_interface_string_new_with_latin1_chars = nullptr;
+GDExtensionInterfaceStringNewWithUtf8Chars gdextension_interface_string_new_with_utf8_chars = nullptr;
+GDExtensionInterfaceStringNewWithUtf16Chars gdextension_interface_string_new_with_utf16_chars = nullptr;
+GDExtensionInterfaceStringNewWithUtf32Chars gdextension_interface_string_new_with_utf32_chars = nullptr;
+GDExtensionInterfaceStringNewWithWideChars gdextension_interface_string_new_with_wide_chars = nullptr;
+GDExtensionInterfaceStringNewWithLatin1CharsAndLen gdextension_interface_string_new_with_latin1_chars_and_len = nullptr;
+GDExtensionInterfaceStringNewWithUtf8CharsAndLen gdextension_interface_string_new_with_utf8_chars_and_len = nullptr;
+GDExtensionInterfaceStringNewWithUtf16CharsAndLen gdextension_interface_string_new_with_utf16_chars_and_len = nullptr;
+GDExtensionInterfaceStringNewWithUtf32CharsAndLen gdextension_interface_string_new_with_utf32_chars_and_len = nullptr;
+GDExtensionInterfaceStringNewWithWideCharsAndLen gdextension_interface_string_new_with_wide_chars_and_len = nullptr;
+GDExtensionInterfaceStringToLatin1Chars gdextension_interface_string_to_latin1_chars = nullptr;
+GDExtensionInterfaceStringToUtf8Chars gdextension_interface_string_to_utf8_chars = nullptr;
+GDExtensionInterfaceStringToUtf16Chars gdextension_interface_string_to_utf16_chars = nullptr;
+GDExtensionInterfaceStringToUtf32Chars gdextension_interface_string_to_utf32_chars = nullptr;
+GDExtensionInterfaceStringToWideChars gdextension_interface_string_to_wide_chars = nullptr;
+GDExtensionInterfaceStringOperatorIndex gdextension_interface_string_operator_index = nullptr;
+GDExtensionInterfaceStringOperatorIndexConst gdextension_interface_string_operator_index_const = nullptr;
+GDExtensionInterfaceStringOperatorPlusEqString gdextension_interface_string_operator_plus_eq_string = nullptr;
+GDExtensionInterfaceStringOperatorPlusEqChar gdextension_interface_string_operator_plus_eq_char = nullptr;
+GDExtensionInterfaceStringOperatorPlusEqCstr gdextension_interface_string_operator_plus_eq_cstr = nullptr;
+GDExtensionInterfaceStringOperatorPlusEqWcstr gdextension_interface_string_operator_plus_eq_wcstr = nullptr;
+GDExtensionInterfaceStringOperatorPlusEqC32str gdextension_interface_string_operator_plus_eq_c32str = nullptr;
+GDExtensionInterfaceStringResize gdextension_interface_string_resize = nullptr;
+GDExtensionInterfaceStringNameNewWithLatin1Chars gdextension_interface_string_name_new_with_latin1_chars = nullptr;
+GDExtensionInterfaceXmlParserOpenBuffer gdextension_interface_xml_parser_open_buffer = nullptr;
+GDExtensionInterfaceFileAccessStoreBuffer gdextension_interface_file_access_store_buffer = nullptr;
+GDExtensionInterfaceFileAccessGetBuffer gdextension_interface_file_access_get_buffer = nullptr;
+GDExtensionInterfaceWorkerThreadPoolAddNativeGroupTask gdextension_interface_worker_thread_pool_add_native_group_task = nullptr;
+GDExtensionInterfaceWorkerThreadPoolAddNativeTask gdextension_interface_worker_thread_pool_add_native_task = nullptr;
+GDExtensionInterfacePackedByteArrayOperatorIndex gdextension_interface_packed_byte_array_operator_index = nullptr;
+GDExtensionInterfacePackedByteArrayOperatorIndexConst gdextension_interface_packed_byte_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedColorArrayOperatorIndex gdextension_interface_packed_color_array_operator_index = nullptr;
+GDExtensionInterfacePackedColorArrayOperatorIndexConst gdextension_interface_packed_color_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedFloat32ArrayOperatorIndex gdextension_interface_packed_float32_array_operator_index = nullptr;
+GDExtensionInterfacePackedFloat32ArrayOperatorIndexConst gdextension_interface_packed_float32_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedFloat64ArrayOperatorIndex gdextension_interface_packed_float64_array_operator_index = nullptr;
+GDExtensionInterfacePackedFloat64ArrayOperatorIndexConst gdextension_interface_packed_float64_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedInt32ArrayOperatorIndex gdextension_interface_packed_int32_array_operator_index = nullptr;
+GDExtensionInterfacePackedInt32ArrayOperatorIndexConst gdextension_interface_packed_int32_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedInt64ArrayOperatorIndex gdextension_interface_packed_int64_array_operator_index = nullptr;
+GDExtensionInterfacePackedInt64ArrayOperatorIndexConst gdextension_interface_packed_int64_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedStringArrayOperatorIndex gdextension_interface_packed_string_array_operator_index = nullptr;
+GDExtensionInterfacePackedStringArrayOperatorIndexConst gdextension_interface_packed_string_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedVector2ArrayOperatorIndex gdextension_interface_packed_vector2_array_operator_index = nullptr;
+GDExtensionInterfacePackedVector2ArrayOperatorIndexConst gdextension_interface_packed_vector2_array_operator_index_const = nullptr;
+GDExtensionInterfacePackedVector3ArrayOperatorIndex gdextension_interface_packed_vector3_array_operator_index = nullptr;
+GDExtensionInterfacePackedVector3ArrayOperatorIndexConst gdextension_interface_packed_vector3_array_operator_index_const = nullptr;
+GDExtensionInterfaceArrayOperatorIndex gdextension_interface_array_operator_index = nullptr;
+GDExtensionInterfaceArrayOperatorIndexConst gdextension_interface_array_operator_index_const = nullptr;
+GDExtensionInterfaceArrayRef gdextension_interface_array_ref = nullptr;
+GDExtensionInterfaceArraySetTyped gdextension_interface_array_set_typed = nullptr;
+GDExtensionInterfaceDictionaryOperatorIndex gdextension_interface_dictionary_operator_index = nullptr;
+GDExtensionInterfaceDictionaryOperatorIndexConst gdextension_interface_dictionary_operator_index_const = nullptr;
+GDExtensionInterfaceObjectMethodBindCall gdextension_interface_object_method_bind_call = nullptr;
+GDExtensionInterfaceObjectMethodBindPtrcall gdextension_interface_object_method_bind_ptrcall = nullptr;
+GDExtensionInterfaceObjectDestroy gdextension_interface_object_destroy = nullptr;
+GDExtensionInterfaceGlobalGetSingleton gdextension_interface_global_get_singleton = nullptr;
+GDExtensionInterfaceObjectGetInstanceBinding gdextension_interface_object_get_instance_binding = nullptr;
+GDExtensionInterfaceObjectSetInstanceBinding gdextension_interface_object_set_instance_binding = nullptr;
+GDExtensionInterfaceObjectSetInstance gdextension_interface_object_set_instance = nullptr;
+GDExtensionInterfaceObjectGetClassName gdextension_interface_object_get_class_name = nullptr;
+GDExtensionInterfaceObjectCastTo gdextension_interface_object_cast_to = nullptr;
+GDExtensionInterfaceObjectGetInstanceFromId gdextension_interface_object_get_instance_from_id = nullptr;
+GDExtensionInterfaceObjectGetInstanceId gdextension_interface_object_get_instance_id = nullptr;
+GDExtensionInterfaceCallableCustomCreate gdextension_interface_callable_custom_create = nullptr;
+GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata = nullptr;
+GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object = nullptr;
+GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object = nullptr;
+GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2 = nullptr;
+GDExtensionInterfacePlaceHolderScriptInstanceCreate gdextension_interface_placeholder_script_instance_create = nullptr;
+GDExtensionInterfacePlaceHolderScriptInstanceUpdate gdextension_interface_placeholder_script_instance_update = nullptr;
+GDExtensionInterfaceClassdbConstructObject gdextension_interface_classdb_construct_object = nullptr;
+GDExtensionInterfaceClassdbGetMethodBind gdextension_interface_classdb_get_method_bind = nullptr;
+GDExtensionInterfaceClassdbGetClassTag gdextension_interface_classdb_get_class_tag = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClass2 gdextension_interface_classdb_register_extension_class2 = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassMethod gdextension_interface_classdb_register_extension_class_method = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassIntegerConstant gdextension_interface_classdb_register_extension_class_integer_constant = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassProperty gdextension_interface_classdb_register_extension_class_property = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassPropertyIndexed gdextension_interface_classdb_register_extension_class_property_indexed = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassPropertyGroup gdextension_interface_classdb_register_extension_class_property_group = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassPropertySubgroup gdextension_interface_classdb_register_extension_class_property_subgroup = nullptr;
+GDExtensionInterfaceClassdbRegisterExtensionClassSignal gdextension_interface_classdb_register_extension_class_signal = nullptr;
+GDExtensionInterfaceClassdbUnregisterExtensionClass gdextension_interface_classdb_unregister_extension_class = nullptr;
+GDExtensionInterfaceGetLibraryPath gdextension_interface_get_library_path = nullptr;
+GDExtensionInterfaceEditorAddPlugin gdextension_interface_editor_add_plugin = nullptr;
+GDExtensionInterfaceEditorRemovePlugin gdextension_interface_editor_remove_plugin = nullptr;
+
 } // namespace internal
 
-GDExtensionBinding::Callback GDExtensionBinding::init_callback = nullptr;
-GDExtensionBinding::Callback GDExtensionBinding::terminate_callback = nullptr;
-GDExtensionInitializationLevel GDExtensionBinding::minimum_initialization_level = GDEXTENSION_INITIALIZATION_CORE;
+bool GDExtensionBinding::api_initialized = false;
+int GDExtensionBinding::level_initialized[MODULE_INITIALIZATION_LEVEL_MAX] = { 0 };
+GDExtensionBinding::InitDataList GDExtensionBinding::initdata;
 
-GDExtensionBool GDExtensionBinding::init(const GDExtensionInterface *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
-	internal::gde_interface = p_interface;
+#define ERR_PRINT_EARLY(m_msg) \
+	internal::gdextension_interface_print_error(m_msg, FUNCTION_STR, __FILE__, __LINE__, false)
+
+#define LOAD_PROC_ADDRESS(m_name, m_type)                                               \
+	internal::gdextension_interface_##m_name = (m_type)p_get_proc_address(#m_name);     \
+	if (!internal::gdextension_interface_##m_name) {                                    \
+		ERR_PRINT_EARLY("Unable to load GDExtension interface function " #m_name "()"); \
+		return false;                                                                   \
+	}
+
+// Partial definition of the legacy interface so we can detect it and show an error.
+typedef struct {
+	uint32_t version_major;
+	uint32_t version_minor;
+	uint32_t version_patch;
+	const char *version_string;
+
+	GDExtensionInterfaceFunctionPtr unused1;
+	GDExtensionInterfaceFunctionPtr unused2;
+	GDExtensionInterfaceFunctionPtr unused3;
+
+	GDExtensionInterfacePrintError print_error;
+	GDExtensionInterfacePrintErrorWithMessage print_error_with_message;
+} LegacyGDExtensionInterface;
+
+GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, InitData *p_init_data, GDExtensionInitialization *r_initialization) {
+	if (!p_init_data || !p_init_data->init_callback) {
+		ERR_FAIL_V_MSG(false, "Initialization callback must be defined.");
+	}
+
+	if (api_initialized) {
+		r_initialization->initialize = initialize_level;
+		r_initialization->deinitialize = deinitialize_level;
+		r_initialization->userdata = p_init_data;
+		r_initialization->minimum_initialization_level = p_init_data->minimum_initialization_level;
+
+		return true;
+	}
+
+	// Make sure we weren't passed the legacy struct.
+	uint32_t *raw_interface = (uint32_t *)(void *)p_get_proc_address;
+	if (raw_interface[0] == 4 && raw_interface[1] == 0) {
+		// Use the legacy interface only to give a nice error.
+		LegacyGDExtensionInterface *legacy_interface = (LegacyGDExtensionInterface *)p_get_proc_address;
+		internal::gdextension_interface_print_error = (GDExtensionInterfacePrintError)legacy_interface->print_error;
+		ERR_PRINT_EARLY("Cannot load a GDExtension built for Godot 4.1+ in Godot 4.0.");
+		return false;
+	}
+
+	// Load the "print_error" function first (needed by the ERR_PRINT_EARLY() macro).
+	internal::gdextension_interface_print_error = (GDExtensionInterfacePrintError)p_get_proc_address("print_error");
+	if (!internal::gdextension_interface_print_error) {
+		printf("ERROR: Unable to load GDExtension interface function print_error().\n");
+		return false;
+	}
+
+	internal::gdextension_interface_get_proc_address = p_get_proc_address;
 	internal::library = p_library;
 	internal::token = p_library;
 
+	LOAD_PROC_ADDRESS(get_godot_version, GDExtensionInterfaceGetGodotVersion);
+	internal::gdextension_interface_get_godot_version(&internal::godot_version);
+
+	// Check that godot-cpp was compiled using an extension_api.json older or at the
+	// same version as the Godot that is loading it.
+	bool compatible;
+	if (internal::godot_version.major != GODOT_VERSION_MAJOR) {
+		compatible = internal::godot_version.major > GODOT_VERSION_MAJOR;
+	} else if (internal::godot_version.minor != GODOT_VERSION_MINOR) {
+		compatible = internal::godot_version.minor > GODOT_VERSION_MINOR;
+	} else {
+		compatible = internal::godot_version.patch >= GODOT_VERSION_PATCH;
+	}
+	if (!compatible) {
+		// We need to use snprintf() here because vformat() uses Variant, and we haven't loaded
+		// the GDExtension interface far enough to use Variants yet.
+		char msg[128];
+		snprintf(msg, 128, "Cannot load a GDExtension built for Godot %d.%d.%d using an older version of Godot (%d.%d.%d).",
+				GODOT_VERSION_MAJOR, GODOT_VERSION_MINOR, GODOT_VERSION_PATCH,
+				internal::godot_version.major, internal::godot_version.minor, internal::godot_version.patch);
+		ERR_PRINT_EARLY(msg);
+		return false;
+	}
+
+	LOAD_PROC_ADDRESS(mem_alloc, GDExtensionInterfaceMemAlloc);
+	LOAD_PROC_ADDRESS(mem_realloc, GDExtensionInterfaceMemRealloc);
+	LOAD_PROC_ADDRESS(mem_free, GDExtensionInterfaceMemFree);
+	LOAD_PROC_ADDRESS(print_error_with_message, GDExtensionInterfacePrintErrorWithMessage);
+	LOAD_PROC_ADDRESS(print_warning, GDExtensionInterfacePrintWarning);
+	LOAD_PROC_ADDRESS(print_warning_with_message, GDExtensionInterfacePrintWarningWithMessage);
+	LOAD_PROC_ADDRESS(print_script_error, GDExtensionInterfacePrintScriptError);
+	LOAD_PROC_ADDRESS(print_script_error_with_message, GDExtensionInterfacePrintScriptErrorWithMessage);
+	LOAD_PROC_ADDRESS(get_native_struct_size, GDExtensionInterfaceGetNativeStructSize);
+	LOAD_PROC_ADDRESS(variant_new_copy, GDExtensionInterfaceVariantNewCopy);
+	LOAD_PROC_ADDRESS(variant_new_nil, GDExtensionInterfaceVariantNewNil);
+	LOAD_PROC_ADDRESS(variant_destroy, GDExtensionInterfaceVariantDestroy);
+	LOAD_PROC_ADDRESS(variant_call, GDExtensionInterfaceVariantCall);
+	LOAD_PROC_ADDRESS(variant_call_static, GDExtensionInterfaceVariantCallStatic);
+	LOAD_PROC_ADDRESS(variant_evaluate, GDExtensionInterfaceVariantEvaluate);
+	LOAD_PROC_ADDRESS(variant_set, GDExtensionInterfaceVariantSet);
+	LOAD_PROC_ADDRESS(variant_set_named, GDExtensionInterfaceVariantSetNamed);
+	LOAD_PROC_ADDRESS(variant_set_keyed, GDExtensionInterfaceVariantSetKeyed);
+	LOAD_PROC_ADDRESS(variant_set_indexed, GDExtensionInterfaceVariantSetIndexed);
+	LOAD_PROC_ADDRESS(variant_get, GDExtensionInterfaceVariantGet);
+	LOAD_PROC_ADDRESS(variant_get_named, GDExtensionInterfaceVariantGetNamed);
+	LOAD_PROC_ADDRESS(variant_get_keyed, GDExtensionInterfaceVariantGetKeyed);
+	LOAD_PROC_ADDRESS(variant_get_indexed, GDExtensionInterfaceVariantGetIndexed);
+	LOAD_PROC_ADDRESS(variant_iter_init, GDExtensionInterfaceVariantIterInit);
+	LOAD_PROC_ADDRESS(variant_iter_next, GDExtensionInterfaceVariantIterNext);
+	LOAD_PROC_ADDRESS(variant_iter_get, GDExtensionInterfaceVariantIterGet);
+	LOAD_PROC_ADDRESS(variant_hash, GDExtensionInterfaceVariantHash);
+	LOAD_PROC_ADDRESS(variant_recursive_hash, GDExtensionInterfaceVariantRecursiveHash);
+	LOAD_PROC_ADDRESS(variant_hash_compare, GDExtensionInterfaceVariantHashCompare);
+	LOAD_PROC_ADDRESS(variant_booleanize, GDExtensionInterfaceVariantBooleanize);
+	LOAD_PROC_ADDRESS(variant_duplicate, GDExtensionInterfaceVariantDuplicate);
+	LOAD_PROC_ADDRESS(variant_stringify, GDExtensionInterfaceVariantStringify);
+	LOAD_PROC_ADDRESS(variant_get_type, GDExtensionInterfaceVariantGetType);
+	LOAD_PROC_ADDRESS(variant_has_method, GDExtensionInterfaceVariantHasMethod);
+	LOAD_PROC_ADDRESS(variant_has_member, GDExtensionInterfaceVariantHasMember);
+	LOAD_PROC_ADDRESS(variant_has_key, GDExtensionInterfaceVariantHasKey);
+	LOAD_PROC_ADDRESS(variant_get_type_name, GDExtensionInterfaceVariantGetTypeName);
+	LOAD_PROC_ADDRESS(variant_can_convert, GDExtensionInterfaceVariantCanConvert);
+	LOAD_PROC_ADDRESS(variant_can_convert_strict, GDExtensionInterfaceVariantCanConvertStrict);
+	LOAD_PROC_ADDRESS(get_variant_from_type_constructor, GDExtensionInterfaceGetVariantFromTypeConstructor);
+	LOAD_PROC_ADDRESS(get_variant_to_type_constructor, GDExtensionInterfaceGetVariantToTypeConstructor);
+	LOAD_PROC_ADDRESS(variant_get_ptr_operator_evaluator, GDExtensionInterfaceVariantGetPtrOperatorEvaluator);
+	LOAD_PROC_ADDRESS(variant_get_ptr_builtin_method, GDExtensionInterfaceVariantGetPtrBuiltinMethod);
+	LOAD_PROC_ADDRESS(variant_get_ptr_constructor, GDExtensionInterfaceVariantGetPtrConstructor);
+	LOAD_PROC_ADDRESS(variant_get_ptr_destructor, GDExtensionInterfaceVariantGetPtrDestructor);
+	LOAD_PROC_ADDRESS(variant_construct, GDExtensionInterfaceVariantConstruct);
+	LOAD_PROC_ADDRESS(variant_get_ptr_setter, GDExtensionInterfaceVariantGetPtrSetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_getter, GDExtensionInterfaceVariantGetPtrGetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_indexed_setter, GDExtensionInterfaceVariantGetPtrIndexedSetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_indexed_getter, GDExtensionInterfaceVariantGetPtrIndexedGetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_keyed_setter, GDExtensionInterfaceVariantGetPtrKeyedSetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_keyed_getter, GDExtensionInterfaceVariantGetPtrKeyedGetter);
+	LOAD_PROC_ADDRESS(variant_get_ptr_keyed_checker, GDExtensionInterfaceVariantGetPtrKeyedChecker);
+	LOAD_PROC_ADDRESS(variant_get_constant_value, GDExtensionInterfaceVariantGetConstantValue);
+	LOAD_PROC_ADDRESS(variant_get_ptr_utility_function, GDExtensionInterfaceVariantGetPtrUtilityFunction);
+	LOAD_PROC_ADDRESS(string_new_with_latin1_chars, GDExtensionInterfaceStringNewWithLatin1Chars);
+	LOAD_PROC_ADDRESS(string_new_with_utf8_chars, GDExtensionInterfaceStringNewWithUtf8Chars);
+	LOAD_PROC_ADDRESS(string_new_with_utf16_chars, GDExtensionInterfaceStringNewWithUtf16Chars);
+	LOAD_PROC_ADDRESS(string_new_with_utf32_chars, GDExtensionInterfaceStringNewWithUtf32Chars);
+	LOAD_PROC_ADDRESS(string_new_with_wide_chars, GDExtensionInterfaceStringNewWithWideChars);
+	LOAD_PROC_ADDRESS(string_new_with_latin1_chars_and_len, GDExtensionInterfaceStringNewWithLatin1CharsAndLen);
+	LOAD_PROC_ADDRESS(string_new_with_utf8_chars_and_len, GDExtensionInterfaceStringNewWithUtf8CharsAndLen);
+	LOAD_PROC_ADDRESS(string_new_with_utf16_chars_and_len, GDExtensionInterfaceStringNewWithUtf16CharsAndLen);
+	LOAD_PROC_ADDRESS(string_new_with_utf32_chars_and_len, GDExtensionInterfaceStringNewWithUtf32CharsAndLen);
+	LOAD_PROC_ADDRESS(string_new_with_wide_chars_and_len, GDExtensionInterfaceStringNewWithWideCharsAndLen);
+	LOAD_PROC_ADDRESS(string_to_latin1_chars, GDExtensionInterfaceStringToLatin1Chars);
+	LOAD_PROC_ADDRESS(string_to_utf8_chars, GDExtensionInterfaceStringToUtf8Chars);
+	LOAD_PROC_ADDRESS(string_to_utf16_chars, GDExtensionInterfaceStringToUtf16Chars);
+	LOAD_PROC_ADDRESS(string_to_utf32_chars, GDExtensionInterfaceStringToUtf32Chars);
+	LOAD_PROC_ADDRESS(string_to_wide_chars, GDExtensionInterfaceStringToWideChars);
+	LOAD_PROC_ADDRESS(string_operator_index, GDExtensionInterfaceStringOperatorIndex);
+	LOAD_PROC_ADDRESS(string_operator_index_const, GDExtensionInterfaceStringOperatorIndexConst);
+	LOAD_PROC_ADDRESS(string_operator_plus_eq_string, GDExtensionInterfaceStringOperatorPlusEqString);
+	LOAD_PROC_ADDRESS(string_operator_plus_eq_char, GDExtensionInterfaceStringOperatorPlusEqChar);
+	LOAD_PROC_ADDRESS(string_operator_plus_eq_cstr, GDExtensionInterfaceStringOperatorPlusEqCstr);
+	LOAD_PROC_ADDRESS(string_operator_plus_eq_wcstr, GDExtensionInterfaceStringOperatorPlusEqWcstr);
+	LOAD_PROC_ADDRESS(string_operator_plus_eq_c32str, GDExtensionInterfaceStringOperatorPlusEqC32str);
+	LOAD_PROC_ADDRESS(string_resize, GDExtensionInterfaceStringResize);
+	LOAD_PROC_ADDRESS(string_name_new_with_latin1_chars, GDExtensionInterfaceStringNameNewWithLatin1Chars);
+	LOAD_PROC_ADDRESS(xml_parser_open_buffer, GDExtensionInterfaceXmlParserOpenBuffer);
+	LOAD_PROC_ADDRESS(file_access_store_buffer, GDExtensionInterfaceFileAccessStoreBuffer);
+	LOAD_PROC_ADDRESS(file_access_get_buffer, GDExtensionInterfaceFileAccessGetBuffer);
+	LOAD_PROC_ADDRESS(worker_thread_pool_add_native_group_task, GDExtensionInterfaceWorkerThreadPoolAddNativeGroupTask);
+	LOAD_PROC_ADDRESS(worker_thread_pool_add_native_task, GDExtensionInterfaceWorkerThreadPoolAddNativeTask);
+	LOAD_PROC_ADDRESS(packed_byte_array_operator_index, GDExtensionInterfacePackedByteArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_byte_array_operator_index_const, GDExtensionInterfacePackedByteArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_color_array_operator_index, GDExtensionInterfacePackedColorArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_color_array_operator_index_const, GDExtensionInterfacePackedColorArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_float32_array_operator_index, GDExtensionInterfacePackedFloat32ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_float32_array_operator_index_const, GDExtensionInterfacePackedFloat32ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_float64_array_operator_index, GDExtensionInterfacePackedFloat64ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_float64_array_operator_index_const, GDExtensionInterfacePackedFloat64ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_int32_array_operator_index, GDExtensionInterfacePackedInt32ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_int32_array_operator_index_const, GDExtensionInterfacePackedInt32ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_int64_array_operator_index, GDExtensionInterfacePackedInt64ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_int64_array_operator_index_const, GDExtensionInterfacePackedInt64ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_string_array_operator_index, GDExtensionInterfacePackedStringArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_string_array_operator_index_const, GDExtensionInterfacePackedStringArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_vector2_array_operator_index, GDExtensionInterfacePackedVector2ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_vector2_array_operator_index_const, GDExtensionInterfacePackedVector2ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(packed_vector3_array_operator_index, GDExtensionInterfacePackedVector3ArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(packed_vector3_array_operator_index_const, GDExtensionInterfacePackedVector3ArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(array_operator_index, GDExtensionInterfaceArrayOperatorIndex);
+	LOAD_PROC_ADDRESS(array_operator_index_const, GDExtensionInterfaceArrayOperatorIndexConst);
+	LOAD_PROC_ADDRESS(array_ref, GDExtensionInterfaceArrayRef);
+	LOAD_PROC_ADDRESS(array_set_typed, GDExtensionInterfaceArraySetTyped);
+	LOAD_PROC_ADDRESS(dictionary_operator_index, GDExtensionInterfaceDictionaryOperatorIndex);
+	LOAD_PROC_ADDRESS(dictionary_operator_index_const, GDExtensionInterfaceDictionaryOperatorIndexConst);
+	LOAD_PROC_ADDRESS(object_method_bind_call, GDExtensionInterfaceObjectMethodBindCall);
+	LOAD_PROC_ADDRESS(object_method_bind_ptrcall, GDExtensionInterfaceObjectMethodBindPtrcall);
+	LOAD_PROC_ADDRESS(object_destroy, GDExtensionInterfaceObjectDestroy);
+	LOAD_PROC_ADDRESS(global_get_singleton, GDExtensionInterfaceGlobalGetSingleton);
+	LOAD_PROC_ADDRESS(object_get_instance_binding, GDExtensionInterfaceObjectGetInstanceBinding);
+	LOAD_PROC_ADDRESS(object_set_instance_binding, GDExtensionInterfaceObjectSetInstanceBinding);
+	LOAD_PROC_ADDRESS(object_set_instance, GDExtensionInterfaceObjectSetInstance);
+	LOAD_PROC_ADDRESS(object_get_class_name, GDExtensionInterfaceObjectGetClassName);
+	LOAD_PROC_ADDRESS(object_cast_to, GDExtensionInterfaceObjectCastTo);
+	LOAD_PROC_ADDRESS(object_get_instance_from_id, GDExtensionInterfaceObjectGetInstanceFromId);
+	LOAD_PROC_ADDRESS(object_get_instance_id, GDExtensionInterfaceObjectGetInstanceId);
+	LOAD_PROC_ADDRESS(callable_custom_create, GDExtensionInterfaceCallableCustomCreate);
+	LOAD_PROC_ADDRESS(callable_custom_get_userdata, GDExtensionInterfaceCallableCustomGetUserData);
+	LOAD_PROC_ADDRESS(ref_get_object, GDExtensionInterfaceRefGetObject);
+	LOAD_PROC_ADDRESS(ref_set_object, GDExtensionInterfaceRefSetObject);
+	LOAD_PROC_ADDRESS(script_instance_create2, GDExtensionInterfaceScriptInstanceCreate2);
+	LOAD_PROC_ADDRESS(placeholder_script_instance_create, GDExtensionInterfacePlaceHolderScriptInstanceCreate);
+	LOAD_PROC_ADDRESS(placeholder_script_instance_update, GDExtensionInterfacePlaceHolderScriptInstanceUpdate);
+	LOAD_PROC_ADDRESS(classdb_construct_object, GDExtensionInterfaceClassdbConstructObject);
+	LOAD_PROC_ADDRESS(classdb_get_method_bind, GDExtensionInterfaceClassdbGetMethodBind);
+	LOAD_PROC_ADDRESS(classdb_get_class_tag, GDExtensionInterfaceClassdbGetClassTag);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class2, GDExtensionInterfaceClassdbRegisterExtensionClass2);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_method, GDExtensionInterfaceClassdbRegisterExtensionClassMethod);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_integer_constant, GDExtensionInterfaceClassdbRegisterExtensionClassIntegerConstant);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_property, GDExtensionInterfaceClassdbRegisterExtensionClassProperty);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_property_indexed, GDExtensionInterfaceClassdbRegisterExtensionClassPropertyIndexed);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_property_group, GDExtensionInterfaceClassdbRegisterExtensionClassPropertyGroup);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_property_subgroup, GDExtensionInterfaceClassdbRegisterExtensionClassPropertySubgroup);
+	LOAD_PROC_ADDRESS(classdb_register_extension_class_signal, GDExtensionInterfaceClassdbRegisterExtensionClassSignal);
+	LOAD_PROC_ADDRESS(classdb_unregister_extension_class, GDExtensionInterfaceClassdbUnregisterExtensionClass);
+	LOAD_PROC_ADDRESS(get_library_path, GDExtensionInterfaceGetLibraryPath);
+	LOAD_PROC_ADDRESS(editor_add_plugin, GDExtensionInterfaceEditorAddPlugin);
+	LOAD_PROC_ADDRESS(editor_remove_plugin, GDExtensionInterfaceEditorRemovePlugin);
+
 	r_initialization->initialize = initialize_level;
 	r_initialization->deinitialize = deinitialize_level;
-	r_initialization->minimum_initialization_level = minimum_initialization_level;
-
-	ERR_FAIL_COND_V_MSG(init_callback == nullptr, false, "Initialization callback must be defined.");
+	r_initialization->userdata = p_init_data;
+	r_initialization->minimum_initialization_level = p_init_data->minimum_initialization_level;
 
 	Variant::init_bindings();
+	godot::internal::register_engine_classes();
 
+	api_initialized = true;
 	return true;
 }
 
-void GDExtensionBinding::initialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
+#undef LOAD_PROC_ADDRESS
+#undef ERR_PRINT_EARLY
+
+void GDExtensionBinding::initialize_level(void *p_userdata, GDExtensionInitializationLevel p_level) {
+	ERR_FAIL_COND(static_cast<ModuleInitializationLevel>(p_level) >= MODULE_INITIALIZATION_LEVEL_MAX);
 	ClassDB::current_level = p_level;
 
-	if (init_callback) {
-		init_callback(static_cast<ModuleInitializationLevel>(p_level));
+	InitData *init_data = static_cast<InitData *>(p_userdata);
+	if (init_data && init_data->init_callback) {
+		init_data->init_callback(static_cast<ModuleInitializationLevel>(p_level));
 	}
 
-	ClassDB::initialize(p_level);
+	if (level_initialized[p_level] == 0) {
+		ClassDB::initialize(p_level);
+	}
+	level_initialized[p_level]++;
 }
 
-void GDExtensionBinding::deinitialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
+void GDExtensionBinding::deinitialize_level(void *p_userdata, GDExtensionInitializationLevel p_level) {
+	ERR_FAIL_COND(static_cast<ModuleInitializationLevel>(p_level) >= MODULE_INITIALIZATION_LEVEL_MAX);
 	ClassDB::current_level = p_level;
 
-	if (terminate_callback) {
-		terminate_callback(static_cast<ModuleInitializationLevel>(p_level));
+	InitData *init_data = static_cast<InitData *>(p_userdata);
+	if (init_data && init_data->terminate_callback) {
+		init_data->terminate_callback(static_cast<ModuleInitializationLevel>(p_level));
 	}
 
-	ClassDB::deinitialize(p_level);
+	level_initialized[p_level]--;
+	if (level_initialized[p_level] == 0) {
+		EditorPlugins::deinitialize(p_level);
+		ClassDB::deinitialize(p_level);
+	}
+}
+
+void GDExtensionBinding::InitDataList::add(InitData *p_data) {
+	if (data_count == data_capacity) {
+		void *new_ptr = realloc(data, sizeof(InitData *) * (data_capacity + 32));
+		if (new_ptr) {
+			data = (InitData **)(new_ptr);
+			data_capacity += 32;
+		} else {
+			ERR_FAIL_MSG("Unable to allocate memory for extension callbacks.");
+		}
+	}
+	data[data_count++] = p_data;
+}
+
+GDExtensionBinding::InitDataList::~InitDataList() {
+	for (int i = 0; i < data_count; i++) {
+		if (data[i]) {
+			delete data[i];
+		}
+	}
+	if (data) {
+		free(data);
+	}
+}
+
+GDExtensionBinding::InitObject::InitObject(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
+	get_proc_address = p_get_proc_address;
+	library = p_library;
+	initialization = r_initialization;
+	init_data = new InitData();
+	GDExtensionBinding::initdata.add(init_data);
 }
 
 void GDExtensionBinding::InitObject::register_initializer(Callback p_init) const {
-	GDExtensionBinding::init_callback = p_init;
+	init_data->init_callback = p_init;
 }
 
 void GDExtensionBinding::InitObject::register_terminator(Callback p_terminate) const {
-	GDExtensionBinding::terminate_callback = p_terminate;
+	init_data->terminate_callback = p_terminate;
 }
 
 void GDExtensionBinding::InitObject::set_minimum_library_initialization_level(ModuleInitializationLevel p_level) const {
-	GDExtensionBinding::minimum_initialization_level = static_cast<GDExtensionInitializationLevel>(p_level);
+	init_data->minimum_initialization_level = static_cast<GDExtensionInitializationLevel>(p_level);
 }
 
 GDExtensionBool GDExtensionBinding::InitObject::init() const {
-	return GDExtensionBinding::init(gde_interface, library, initialization);
+	return GDExtensionBinding::init(get_proc_address, library, init_data, initialization);
 }
 
 } // namespace godot
-
-extern "C" {
-
-void GDE_EXPORT initialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
-	godot::GDExtensionBinding::initialize_level(userdata, p_level);
-}
-
-void GDE_EXPORT deinitialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
-	godot::GDExtensionBinding::deinitialize_level(userdata, p_level);
-}
-}

src/variant/callable_custom.cpp

@@ -0,0 +1,113 @@
+/**************************************************************************/
+/*  callable_custom.cpp                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include <godot_cpp/variant/callable_custom.hpp>
+
+#include <godot_cpp/core/object.hpp>
+#include <godot_cpp/variant/callable.hpp>
+
+namespace godot {
+
+static void callable_custom_call(void *p_userdata, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	callable_custom->call((const Variant **)p_args, p_argument_count, *(Variant *)r_return, *r_error);
+}
+
+static GDExtensionBool callable_custom_is_valid(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	return callable_custom->is_valid();
+}
+
+static void callable_custom_free(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	memdelete(callable_custom);
+}
+
+static uint32_t callable_custom_hash(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	return callable_custom->hash();
+}
+
+static void callable_custom_to_string(void *p_userdata, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	*((String *)r_out) = callable_custom->get_as_text();
+	*r_is_valid = true;
+}
+
+static GDExtensionBool callable_custom_equal_func(void *p_a, void *p_b) {
+	CallableCustom *a = (CallableCustom *)p_a;
+	CallableCustom *b = (CallableCustom *)p_b;
+	CallableCustom::CompareEqualFunc func_a = a->get_compare_equal_func();
+	CallableCustom::CompareEqualFunc func_b = b->get_compare_equal_func();
+	if (func_a != func_b) {
+		return false;
+	}
+	return func_a(a, b);
+}
+
+static GDExtensionBool callable_custom_less_than_func(void *p_a, void *p_b) {
+	CallableCustom *a = (CallableCustom *)p_a;
+	CallableCustom *b = (CallableCustom *)p_b;
+	CallableCustom::CompareEqualFunc func_a = a->get_compare_less_func();
+	CallableCustom::CompareEqualFunc func_b = b->get_compare_less_func();
+	if (func_a != func_b) {
+		// Just compare the addresses.
+		return p_a < p_b;
+	}
+	return func_a(a, b);
+}
+
+bool CallableCustom::is_valid() const {
+	// The same default implementation as in Godot.
+	return ObjectDB::get_instance(get_object());
+}
+
+Callable::Callable(CallableCustom *p_callable_custom) {
+	GDExtensionCallableCustomInfo info = {};
+	info.callable_userdata = p_callable_custom;
+	info.token = internal::token;
+	info.object_id = p_callable_custom->get_object();
+	info.call_func = &callable_custom_call;
+	info.is_valid_func = &callable_custom_is_valid;
+	info.free_func = &callable_custom_free;
+	info.hash_func = &callable_custom_hash;
+	info.equal_func = &callable_custom_equal_func;
+	info.less_than_func = &callable_custom_less_than_func;
+	info.to_string_func = &callable_custom_to_string;
+
+	::godot::internal::gdextension_interface_callable_custom_create(_native_ptr(), &info);
+}
+
+CallableCustom *Callable::get_custom() const {
+	CallableCustomBase *callable_custom = (CallableCustomBase *)::godot::internal::gdextension_interface_callable_custom_get_userdata(_native_ptr(), internal::token);
+	return dynamic_cast<CallableCustom *>(callable_custom);
+}
+
+} // namespace godot

src/variant/callable_method_pointer.cpp

@@ -0,0 +1,114 @@
+/**************************************************************************/
+/*  callable_method_pointer.cpp                                           */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include <godot_cpp/variant/callable_method_pointer.hpp>
+
+#include <godot_cpp/templates/hashfuncs.hpp>
+
+namespace godot {
+
+static void custom_callable_mp_call(void *p_userdata, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	callable_method_pointer->call((const Variant **)p_args, p_argument_count, *(Variant *)r_return, *r_error);
+}
+
+static GDExtensionBool custom_callable_mp_is_valid(void *p_userdata) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	ObjectID object = callable_method_pointer->get_object();
+	return object == ObjectID() || ObjectDB::get_instance(object);
+}
+
+static void custom_callable_mp_free(void *p_userdata) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	memdelete(callable_method_pointer);
+}
+
+static uint32_t custom_callable_mp_hash(void *p_userdata) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	return callable_method_pointer->get_hash();
+}
+
+static GDExtensionBool custom_callable_mp_equal_func(void *p_a, void *p_b) {
+	CallableCustomMethodPointerBase *a = (CallableCustomMethodPointerBase *)p_a;
+	CallableCustomMethodPointerBase *b = (CallableCustomMethodPointerBase *)p_b;
+
+	if (a->get_comp_size() != b->get_comp_size()) {
+		return false;
+	}
+
+	return memcmp(a->get_comp_ptr(), b->get_comp_ptr(), a->get_comp_size() * 4) == 0;
+}
+
+static GDExtensionBool custom_callable_mp_less_than_func(void *p_a, void *p_b) {
+	CallableCustomMethodPointerBase *a = (CallableCustomMethodPointerBase *)p_a;
+	CallableCustomMethodPointerBase *b = (CallableCustomMethodPointerBase *)p_b;
+
+	if (a->get_comp_size() != b->get_comp_size()) {
+		return a->get_comp_size() < b->get_comp_size();
+	}
+
+	return memcmp(a->get_comp_ptr(), b->get_comp_ptr(), a->get_comp_size() * 4) < 0;
+}
+
+void CallableCustomMethodPointerBase::_setup(uint32_t *p_base_ptr, uint32_t p_ptr_size) {
+	comp_ptr = p_base_ptr;
+	comp_size = p_ptr_size / 4;
+
+	for (uint32_t i = 0; i < comp_size; i++) {
+		if (i == 0) {
+			h = hash_murmur3_one_32(comp_ptr[i]);
+		} else {
+			h = hash_murmur3_one_32(comp_ptr[i], h);
+		}
+	}
+}
+
+namespace internal {
+
+Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer) {
+	GDExtensionCallableCustomInfo info = {};
+	info.callable_userdata = p_callable_method_pointer;
+	info.token = internal::token;
+	info.object_id = p_callable_method_pointer->get_object();
+	info.call_func = &custom_callable_mp_call;
+	info.is_valid_func = &custom_callable_mp_is_valid;
+	info.free_func = &custom_callable_mp_free;
+	info.hash_func = &custom_callable_mp_hash;
+	info.equal_func = &custom_callable_mp_equal_func;
+	info.less_than_func = &custom_callable_mp_less_than_func;
+
+	Callable callable;
+	::godot::internal::gdextension_interface_callable_custom_create(callable._native_ptr(), &info);
+	return callable;
+}
+
+} // namespace internal
+
+} // namespace godot

src/variant/char_string.cpp

@@ -38,134 +38,138 @@
 #include <godot_cpp/godot.hpp>
 
 #include <cmath>
+#include <string>
 
 namespace godot {
 
-int CharString::length() const {
-	return _length;
-}
+template <typename L, typename R>
+_FORCE_INLINE_ bool is_str_less(const L *l_ptr, const R *r_ptr) {
+	while (true) {
+		const char32_t l = *l_ptr;
+		const char32_t r = *r_ptr;
 
-const char *CharString::get_data() const {
-	return _data;
-}
+		if (l == 0 && r == 0) {
+			return false;
+		} else if (l == 0) {
+			return true;
+		} else if (r == 0) {
+			return false;
+		} else if (l < r) {
+			return true;
+		} else if (l > r) {
+			return false;
+		}
 
-CharString::CharString(CharString &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-void CharString::operator=(CharString &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-CharString::CharString(const char *str, int length) :
-		_data(str), _length(length) {}
-
-CharString::~CharString() {
-	if (_data != nullptr) {
-		memdelete_arr(_data);
+		l_ptr++;
+		r_ptr++;
 	}
 }
 
-int Char16String::length() const {
-	return _length;
+template <class T>
+bool CharStringT<T>::operator<(const CharStringT<T> &p_right) const {
+	if (length() == 0) {
+		return p_right.length() != 0;
+	}
+
+	return is_str_less(get_data(), p_right.get_data());
 }
 
-const char16_t *Char16String::get_data() const {
-	return _data;
+template <class T>
+CharStringT<T> &CharStringT<T>::operator+=(T p_char) {
+	const int lhs_len = length();
+	resize(lhs_len + 2);
+
+	T *dst = ptrw();
+	dst[lhs_len] = p_char;
+	dst[lhs_len + 1] = 0;
+
+	return *this;
 }
 
-Char16String::Char16String(Char16String &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
+template <class T>
+void CharStringT<T>::operator=(const T *p_cstr) {
+	copy_from(p_cstr);
 }
 
-void Char16String::operator=(Char16String &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-Char16String::Char16String(const char16_t *str, int length) :
-		_data(str), _length(length) {}
-
-Char16String::~Char16String() {
-	if (_data != nullptr) {
-		memdelete_arr(_data);
+template <>
+const char *CharStringT<char>::get_data() const {
+	if (size()) {
+		return &operator[](0);
+	} else {
+		return "";
 	}
 }
 
-int Char32String::length() const {
-	return _length;
-}
-
-const char32_t *Char32String::get_data() const {
-	return _data;
-}
-
-Char32String::Char32String(Char32String &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-void Char32String::operator=(Char32String &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-Char32String::Char32String(const char32_t *str, int length) :
-		_data(str), _length(length) {}
-
-Char32String::~Char32String() {
-	if (_data != nullptr) {
-		memdelete_arr(_data);
+template <>
+const char16_t *CharStringT<char16_t>::get_data() const {
+	if (size()) {
+		return &operator[](0);
+	} else {
+		return u"";
 	}
 }
 
-int CharWideString::length() const {
-	return _length;
-}
-
-const wchar_t *CharWideString::get_data() const {
-	return _data;
-}
-
-CharWideString::CharWideString(CharWideString &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-void CharWideString::operator=(CharWideString &&p_str) {
-	SWAP(_length, p_str._length);
-	SWAP(_data, p_str._data);
-}
-
-CharWideString::CharWideString(const wchar_t *str, int length) :
-		_data(str), _length(length) {}
-
-CharWideString::~CharWideString() {
-	if (_data != nullptr) {
-		memdelete_arr(_data);
+template <>
+const char32_t *CharStringT<char32_t>::get_data() const {
+	if (size()) {
+		return &operator[](0);
+	} else {
+		return U"";
 	}
 }
 
+template <>
+const wchar_t *CharStringT<wchar_t>::get_data() const {
+	if (size()) {
+		return &operator[](0);
+	} else {
+		return L"";
+	}
+}
+
+template <class T>
+void CharStringT<T>::copy_from(const T *p_cstr) {
+	if (!p_cstr) {
+		resize(0);
+		return;
+	}
+
+	size_t len = std::char_traits<T>::length(p_cstr);
+
+	if (len == 0) {
+		resize(0);
+		return;
+	}
+
+	Error err = resize(++len); // include terminating null char
+
+	ERR_FAIL_COND_MSG(err != OK, "Failed to copy C-string.");
+
+	memcpy(ptrw(), p_cstr, len);
+}
+
+template class CharStringT<char>;
+template class CharStringT<char16_t>;
+template class CharStringT<char32_t>;
+template class CharStringT<wchar_t>;
+
 // Custom String functions that are not part of bound API.
 // It's easier to have them written in C++ directly than in a Python script that generates them.
 
 String::String(const char *from) {
-	internal::gde_interface->string_new_with_latin1_chars(_native_ptr(), from);
+	internal::gdextension_interface_string_new_with_latin1_chars(_native_ptr(), from);
 }
 
 String::String(const wchar_t *from) {
-	internal::gde_interface->string_new_with_wide_chars(_native_ptr(), from);
+	internal::gdextension_interface_string_new_with_wide_chars(_native_ptr(), from);
 }
 
 String::String(const char16_t *from) {
-	internal::gde_interface->string_new_with_utf16_chars(_native_ptr(), from);
+	internal::gdextension_interface_string_new_with_utf16_chars(_native_ptr(), from);
 }
 
 String::String(const char32_t *from) {
-	internal::gde_interface->string_new_with_utf32_chars(_native_ptr(), from);
+	internal::gdextension_interface_string_new_with_utf32_chars(_native_ptr(), from);
 }
 
 String String::utf8(const char *from, int len) {
@@ -175,7 +179,7 @@ String String::utf8(const char *from, int len) {
 }
 
 void String::parse_utf8(const char *from, int len) {
-	internal::gde_interface->string_new_with_utf8_chars_and_len(_native_ptr(), from, len);
+	internal::gdextension_interface_string_new_with_utf8_chars_and_len(_native_ptr(), from, len);
 }
 
 String String::utf16(const char16_t *from, int len) {
@@ -185,7 +189,7 @@ String String::utf16(const char16_t *from, int len) {
 }
 
 void String::parse_utf16(const char16_t *from, int len) {
-	internal::gde_interface->string_new_with_utf16_chars_and_len(_native_ptr(), from, len);
+	internal::gdextension_interface_string_new_with_utf16_chars_and_len(_native_ptr(), from, len);
 }
 
 String String::num_real(double p_num, bool p_trailing) {
@@ -226,58 +230,67 @@ String rtoss(double p_val) {
 }
 
 CharString String::utf8() const {
-	int length = internal::gde_interface->string_to_utf8_chars(_native_ptr(), nullptr, 0);
+	int length = internal::gdextension_interface_string_to_utf8_chars(_native_ptr(), nullptr, 0);
 	int size = length + 1;
-	char *cstr = memnew_arr(char, size);
-	internal::gde_interface->string_to_utf8_chars(_native_ptr(), cstr, length);
+	CharString str;
+	str.resize(size);
+	internal::gdextension_interface_string_to_utf8_chars(_native_ptr(), str.ptrw(), length);
 
-	cstr[length] = '\0';
+	str[length] = '\0';
 
-	return CharString(cstr, length);
+	return str;
 }
 
 CharString String::ascii() const {
-	int length = internal::gde_interface->string_to_latin1_chars(_native_ptr(), nullptr, 0);
+	int length = internal::gdextension_interface_string_to_latin1_chars(_native_ptr(), nullptr, 0);
 	int size = length + 1;
-	char *cstr = memnew_arr(char, size);
-	internal::gde_interface->string_to_latin1_chars(_native_ptr(), cstr, length);
+	CharString str;
+	str.resize(size);
+	internal::gdextension_interface_string_to_latin1_chars(_native_ptr(), str.ptrw(), length);
 
-	cstr[length] = '\0';
+	str[length] = '\0';
 
-	return CharString(cstr, length);
+	return str;
 }
 
 Char16String String::utf16() const {
-	int length = internal::gde_interface->string_to_utf16_chars(_native_ptr(), nullptr, 0);
+	int length = internal::gdextension_interface_string_to_utf16_chars(_native_ptr(), nullptr, 0);
 	int size = length + 1;
-	char16_t *cstr = memnew_arr(char16_t, size);
-	internal::gde_interface->string_to_utf16_chars(_native_ptr(), cstr, length);
+	Char16String str;
+	str.resize(size);
+	internal::gdextension_interface_string_to_utf16_chars(_native_ptr(), str.ptrw(), length);
 
-	cstr[length] = '\0';
+	str[length] = '\0';
 
-	return Char16String(cstr, length);
+	return str;
 }
 
 Char32String String::utf32() const {
-	int length = internal::gde_interface->string_to_utf32_chars(_native_ptr(), nullptr, 0);
+	int length = internal::gdextension_interface_string_to_utf32_chars(_native_ptr(), nullptr, 0);
 	int size = length + 1;
-	char32_t *cstr = memnew_arr(char32_t, size);
-	internal::gde_interface->string_to_utf32_chars(_native_ptr(), cstr, length);
+	Char32String str;
+	str.resize(size);
+	internal::gdextension_interface_string_to_utf32_chars(_native_ptr(), str.ptrw(), length);
 
-	cstr[length] = '\0';
+	str[length] = '\0';
 
-	return Char32String(cstr, length);
+	return str;
 }
 
 CharWideString String::wide_string() const {
-	int length = internal::gde_interface->string_to_wide_chars(_native_ptr(), nullptr, 0);
+	int length = internal::gdextension_interface_string_to_wide_chars(_native_ptr(), nullptr, 0);
 	int size = length + 1;
-	wchar_t *cstr = memnew_arr(wchar_t, size);
-	internal::gde_interface->string_to_wide_chars(_native_ptr(), cstr, length);
+	CharWideString str;
+	str.resize(size);
+	internal::gdextension_interface_string_to_wide_chars(_native_ptr(), str.ptrw(), length);
 
-	cstr[length] = '\0';
+	str[length] = '\0';
 
-	return CharWideString(cstr, length);
+	return str;
+}
+
+Error String::resize(int p_size) {
+	return (Error)internal::gdextension_interface_string_resize(_native_ptr(), p_size);
 }
 
 String &String::operator=(const char *p_str) {
@@ -353,44 +366,44 @@ String String::operator+(const char32_t p_char) {
 }
 
 String &String::operator+=(const String &p_str) {
-	internal::gde_interface->string_operator_plus_eq_string((GDExtensionStringPtr)this, (GDExtensionConstStringPtr)&p_str);
+	internal::gdextension_interface_string_operator_plus_eq_string((GDExtensionStringPtr)this, (GDExtensionConstStringPtr)&p_str);
 	return *this;
 }
 
 String &String::operator+=(char32_t p_char) {
-	internal::gde_interface->string_operator_plus_eq_char((GDExtensionStringPtr)this, p_char);
+	internal::gdextension_interface_string_operator_plus_eq_char((GDExtensionStringPtr)this, p_char);
 	return *this;
 }
 
 String &String::operator+=(const char *p_str) {
-	internal::gde_interface->string_operator_plus_eq_cstr((GDExtensionStringPtr)this, p_str);
+	internal::gdextension_interface_string_operator_plus_eq_cstr((GDExtensionStringPtr)this, p_str);
 	return *this;
 }
 
 String &String::operator+=(const wchar_t *p_str) {
-	internal::gde_interface->string_operator_plus_eq_wcstr((GDExtensionStringPtr)this, p_str);
+	internal::gdextension_interface_string_operator_plus_eq_wcstr((GDExtensionStringPtr)this, p_str);
 	return *this;
 }
 
 String &String::operator+=(const char32_t *p_str) {
-	internal::gde_interface->string_operator_plus_eq_c32str((GDExtensionStringPtr)this, p_str);
+	internal::gdextension_interface_string_operator_plus_eq_c32str((GDExtensionStringPtr)this, p_str);
 	return *this;
 }
 
 const char32_t &String::operator[](int p_index) const {
-	return *internal::gde_interface->string_operator_index_const((GDExtensionStringPtr)this, p_index);
+	return *internal::gdextension_interface_string_operator_index_const((GDExtensionStringPtr)this, p_index);
 }
 
 char32_t &String::operator[](int p_index) {
-	return *internal::gde_interface->string_operator_index((GDExtensionStringPtr)this, p_index);
+	return *internal::gdextension_interface_string_operator_index((GDExtensionStringPtr)this, p_index);
 }
 
 const char32_t *String::ptr() const {
-	return internal::gde_interface->string_operator_index_const((GDExtensionStringPtr)this, 0);
+	return internal::gdextension_interface_string_operator_index_const((GDExtensionStringPtr)this, 0);
 }
 
 char32_t *String::ptrw() {
-	return internal::gde_interface->string_operator_index((GDExtensionStringPtr)this, 0);
+	return internal::gdextension_interface_string_operator_index((GDExtensionStringPtr)this, 0);
 }
 
 bool operator==(const char *p_chr, const String &p_str) {
@@ -445,8 +458,9 @@ String operator+(char32_t p_char, const String &p_str) {
 	return String::chr(p_char) + p_str;
 }
 
-StringName::StringName(const char *from) :
-		StringName(String(from)) {}
+StringName::StringName(const char *from, bool p_static) {
+	internal::gdextension_interface_string_name_new_with_latin1_chars(&opaque, from, p_static);
+}
 
 StringName::StringName(const wchar_t *from) :
 		StringName(String(from)) {}

src/variant/packed_arrays.cpp

@@ -47,183 +47,183 @@
 namespace godot {
 
 const uint8_t &PackedByteArray::operator[](int p_index) const {
-	return *internal::gde_interface->packed_byte_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_byte_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 }
 
 uint8_t &PackedByteArray::operator[](int p_index) {
-	return *internal::gde_interface->packed_byte_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_byte_array_operator_index((GDExtensionTypePtr *)this, p_index);
 }
 
 const uint8_t *PackedByteArray::ptr() const {
-	return internal::gde_interface->packed_byte_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_byte_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 uint8_t *PackedByteArray::ptrw() {
-	return internal::gde_interface->packed_byte_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_byte_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const Color &PackedColorArray::operator[](int p_index) const {
-	const Color *color = (const Color *)internal::gde_interface->packed_color_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	const Color *color = (const Color *)internal::gdextension_interface_packed_color_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 	return *color;
 }
 
 Color &PackedColorArray::operator[](int p_index) {
-	Color *color = (Color *)internal::gde_interface->packed_color_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	Color *color = (Color *)internal::gdextension_interface_packed_color_array_operator_index((GDExtensionTypePtr *)this, p_index);
 	return *color;
 }
 
 const Color *PackedColorArray::ptr() const {
-	return (const Color *)internal::gde_interface->packed_color_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return (const Color *)internal::gdextension_interface_packed_color_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 Color *PackedColorArray::ptrw() {
-	return (Color *)internal::gde_interface->packed_color_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return (Color *)internal::gdextension_interface_packed_color_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const float &PackedFloat32Array::operator[](int p_index) const {
-	return *internal::gde_interface->packed_float32_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_float32_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 }
 
 float &PackedFloat32Array::operator[](int p_index) {
-	return *internal::gde_interface->packed_float32_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_float32_array_operator_index((GDExtensionTypePtr *)this, p_index);
 }
 
 const float *PackedFloat32Array::ptr() const {
-	return internal::gde_interface->packed_float32_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_float32_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 float *PackedFloat32Array::ptrw() {
-	return internal::gde_interface->packed_float32_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_float32_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const double &PackedFloat64Array::operator[](int p_index) const {
-	return *internal::gde_interface->packed_float64_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_float64_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 }
 
 double &PackedFloat64Array::operator[](int p_index) {
-	return *internal::gde_interface->packed_float64_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_float64_array_operator_index((GDExtensionTypePtr *)this, p_index);
 }
 
 const double *PackedFloat64Array::ptr() const {
-	return internal::gde_interface->packed_float64_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_float64_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 double *PackedFloat64Array::ptrw() {
-	return internal::gde_interface->packed_float64_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_float64_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const int32_t &PackedInt32Array::operator[](int p_index) const {
-	return *internal::gde_interface->packed_int32_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_int32_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 }
 
 int32_t &PackedInt32Array::operator[](int p_index) {
-	return *internal::gde_interface->packed_int32_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_int32_array_operator_index((GDExtensionTypePtr *)this, p_index);
 }
 
 const int32_t *PackedInt32Array::ptr() const {
-	return internal::gde_interface->packed_int32_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_int32_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 int32_t *PackedInt32Array::ptrw() {
-	return internal::gde_interface->packed_int32_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_int32_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const int64_t &PackedInt64Array::operator[](int p_index) const {
-	return *internal::gde_interface->packed_int64_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_int64_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 }
 
 int64_t &PackedInt64Array::operator[](int p_index) {
-	return *internal::gde_interface->packed_int64_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	return *internal::gdextension_interface_packed_int64_array_operator_index((GDExtensionTypePtr *)this, p_index);
 }
 
 const int64_t *PackedInt64Array::ptr() const {
-	return internal::gde_interface->packed_int64_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_int64_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 int64_t *PackedInt64Array::ptrw() {
-	return internal::gde_interface->packed_int64_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return internal::gdextension_interface_packed_int64_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const String &PackedStringArray::operator[](int p_index) const {
-	const String *string = (const String *)internal::gde_interface->packed_string_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	const String *string = (const String *)internal::gdextension_interface_packed_string_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 	return *string;
 }
 
 String &PackedStringArray::operator[](int p_index) {
-	String *string = (String *)internal::gde_interface->packed_string_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	String *string = (String *)internal::gdextension_interface_packed_string_array_operator_index((GDExtensionTypePtr *)this, p_index);
 	return *string;
 }
 
 const String *PackedStringArray::ptr() const {
-	return (const String *)internal::gde_interface->packed_string_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return (const String *)internal::gdextension_interface_packed_string_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 String *PackedStringArray::ptrw() {
-	return (String *)internal::gde_interface->packed_string_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return (String *)internal::gdextension_interface_packed_string_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const Vector2 &PackedVector2Array::operator[](int p_index) const {
-	const Vector2 *vec = (const Vector2 *)internal::gde_interface->packed_vector2_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	const Vector2 *vec = (const Vector2 *)internal::gdextension_interface_packed_vector2_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 	return *vec;
 }
 
 Vector2 &PackedVector2Array::operator[](int p_index) {
-	Vector2 *vec = (Vector2 *)internal::gde_interface->packed_vector2_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	Vector2 *vec = (Vector2 *)internal::gdextension_interface_packed_vector2_array_operator_index((GDExtensionTypePtr *)this, p_index);
 	return *vec;
 }
 
 const Vector2 *PackedVector2Array::ptr() const {
-	return (const Vector2 *)internal::gde_interface->packed_vector2_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return (const Vector2 *)internal::gdextension_interface_packed_vector2_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 Vector2 *PackedVector2Array::ptrw() {
-	return (Vector2 *)internal::gde_interface->packed_vector2_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return (Vector2 *)internal::gdextension_interface_packed_vector2_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const Vector3 &PackedVector3Array::operator[](int p_index) const {
-	const Vector3 *vec = (const Vector3 *)internal::gde_interface->packed_vector3_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	const Vector3 *vec = (const Vector3 *)internal::gdextension_interface_packed_vector3_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 	return *vec;
 }
 
 Vector3 &PackedVector3Array::operator[](int p_index) {
-	Vector3 *vec = (Vector3 *)internal::gde_interface->packed_vector3_array_operator_index((GDExtensionTypePtr *)this, p_index);
+	Vector3 *vec = (Vector3 *)internal::gdextension_interface_packed_vector3_array_operator_index((GDExtensionTypePtr *)this, p_index);
 	return *vec;
 }
 
 const Vector3 *PackedVector3Array::ptr() const {
-	return (const Vector3 *)internal::gde_interface->packed_vector3_array_operator_index_const((GDExtensionTypePtr *)this, 0);
+	return (const Vector3 *)internal::gdextension_interface_packed_vector3_array_operator_index_const((GDExtensionTypePtr *)this, 0);
 }
 
 Vector3 *PackedVector3Array::ptrw() {
-	return (Vector3 *)internal::gde_interface->packed_vector3_array_operator_index((GDExtensionTypePtr *)this, 0);
+	return (Vector3 *)internal::gdextension_interface_packed_vector3_array_operator_index((GDExtensionTypePtr *)this, 0);
 }
 
 const Variant &Array::operator[](int p_index) const {
-	const Variant *var = (const Variant *)internal::gde_interface->array_operator_index_const((GDExtensionTypePtr *)this, p_index);
+	const Variant *var = (const Variant *)internal::gdextension_interface_array_operator_index_const((GDExtensionTypePtr *)this, p_index);
 	return *var;
 }
 
 Variant &Array::operator[](int p_index) {
-	Variant *var = (Variant *)internal::gde_interface->array_operator_index((GDExtensionTypePtr *)this, p_index);
+	Variant *var = (Variant *)internal::gdextension_interface_array_operator_index((GDExtensionTypePtr *)this, p_index);
 	return *var;
 }
 
 void Array::set_typed(uint32_t p_type, const StringName &p_class_name, const Variant &p_script) {
 	// p_type is not Variant::Type so that header doesn't depend on <variant.hpp>.
-	internal::gde_interface->array_set_typed((GDExtensionTypePtr *)this, (GDExtensionVariantType)p_type, (GDExtensionConstStringNamePtr)&p_class_name, (GDExtensionConstVariantPtr)&p_script);
+	internal::gdextension_interface_array_set_typed((GDExtensionTypePtr *)this, (GDExtensionVariantType)p_type, (GDExtensionConstStringNamePtr)&p_class_name, (GDExtensionConstVariantPtr)&p_script);
 }
 
 void Array::_ref(const Array &p_from) const {
-	internal::gde_interface->array_ref((GDExtensionTypePtr *)this, (GDExtensionConstTypePtr *)&p_from);
+	internal::gdextension_interface_array_ref((GDExtensionTypePtr *)this, (GDExtensionConstTypePtr *)&p_from);
 }
 
 const Variant &Dictionary::operator[](const Variant &p_key) const {
-	const Variant *var = (const Variant *)internal::gde_interface->dictionary_operator_index_const((GDExtensionTypePtr *)this, (GDExtensionVariantPtr)&p_key);
+	const Variant *var = (const Variant *)internal::gdextension_interface_dictionary_operator_index_const((GDExtensionTypePtr *)this, (GDExtensionVariantPtr)&p_key);
 	return *var;
 }
 
 Variant &Dictionary::operator[](const Variant &p_key) {
-	Variant *var = (Variant *)internal::gde_interface->dictionary_operator_index((GDExtensionTypePtr *)this, (GDExtensionVariantPtr)&p_key);
+	Variant *var = (Variant *)internal::gdextension_interface_dictionary_operator_index((GDExtensionTypePtr *)this, (GDExtensionVariantPtr)&p_key);
 	return *var;
 }
 

src/variant/variant.cpp

@@ -33,6 +33,7 @@
 #include <godot_cpp/godot.hpp>
 
 #include <godot_cpp/core/binder_common.hpp>
+#include <godot_cpp/core/class_db.hpp>
 #include <godot_cpp/core/defs.hpp>
 
 #include <utility>
@@ -45,8 +46,8 @@ GDExtensionTypeFromVariantConstructorFunc Variant::to_type_constructor[Variant::
 void Variant::init_bindings() {
 	// Start from 1 to skip NIL.
 	for (int i = 1; i < VARIANT_MAX; i++) {
-		from_type_constructor[i] = internal::gde_interface->get_variant_from_type_constructor((GDExtensionVariantType)i);
-		to_type_constructor[i] = internal::gde_interface->get_variant_to_type_constructor((GDExtensionVariantType)i);
+		from_type_constructor[i] = internal::gdextension_interface_get_variant_from_type_constructor((GDExtensionVariantType)i);
+		to_type_constructor[i] = internal::gdextension_interface_get_variant_to_type_constructor((GDExtensionVariantType)i);
 	}
 
 	StringName::init_bindings();
@@ -69,15 +70,15 @@ void Variant::init_bindings() {
 }
 
 Variant::Variant() {
-	internal::gde_interface->variant_new_nil(_native_ptr());
+	internal::gdextension_interface_variant_new_nil(_native_ptr());
 }
 
 Variant::Variant(GDExtensionConstVariantPtr native_ptr) {
-	internal::gde_interface->variant_new_copy(_native_ptr(), native_ptr);
+	internal::gdextension_interface_variant_new_copy(_native_ptr(), native_ptr);
 }
 
 Variant::Variant(const Variant &other) {
-	internal::gde_interface->variant_new_copy(_native_ptr(), other._native_ptr());
+	internal::gdextension_interface_variant_new_copy(_native_ptr(), other._native_ptr());
 }
 
 Variant::Variant(Variant &&other) {
@@ -248,7 +249,7 @@ Variant::Variant(const PackedColorArray &v) {
 }
 
 Variant::~Variant() {
-	internal::gde_interface->variant_destroy(_native_ptr());
+	internal::gdextension_interface_variant_destroy(_native_ptr());
 }
 
 Variant::operator bool() const {
@@ -267,6 +268,14 @@ Variant::operator int32_t() const {
 	return static_cast<int32_t>(operator int64_t());
 }
 
+Variant::operator int16_t() const {
+	return static_cast<int16_t>(operator int64_t());
+}
+
+Variant::operator int8_t() const {
+	return static_cast<int8_t>(operator int64_t());
+}
+
 Variant::operator uint64_t() const {
 	return static_cast<uint64_t>(operator int64_t());
 }
@@ -275,6 +284,14 @@ Variant::operator uint32_t() const {
 	return static_cast<uint32_t>(operator int64_t());
 }
 
+Variant::operator uint16_t() const {
+	return static_cast<uint16_t>(operator int64_t());
+}
+
+Variant::operator uint8_t() const {
+	return static_cast<uint8_t>(operator int64_t());
+}
+
 Variant::operator double() const {
 	double result;
 	to_type_constructor[FLOAT](&result, _native_ptr());
@@ -411,7 +428,7 @@ Variant::operator Object *() const {
 	if (obj == nullptr) {
 		return nullptr;
 	}
-	return reinterpret_cast<Object *>(internal::gde_interface->object_get_instance_binding(obj, internal::token, &Object::___binding_callbacks));
+	return internal::get_object_instance_binding(obj);
 }
 
 Variant::operator ObjectID() const {
@@ -509,7 +526,7 @@ Variant::operator PackedColorArray() const {
 
 Variant &Variant::operator=(const Variant &other) {
 	clear();
-	internal::gde_interface->variant_new_copy(_native_ptr(), other._native_ptr());
+	internal::gdextension_interface_variant_new_copy(_native_ptr(), other._native_ptr());
 	return *this;
 }
 
@@ -548,23 +565,23 @@ bool Variant::operator<(const Variant &other) const {
 	return result.operator bool();
 }
 
-void Variant::call(const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error) {
-	internal::gde_interface->variant_call(_native_ptr(), method._native_ptr(), reinterpret_cast<GDExtensionConstVariantPtr *>(args), argcount, r_ret._native_ptr(), &r_error);
+void Variant::callp(const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+	internal::gdextension_interface_variant_call(_native_ptr(), method._native_ptr(), reinterpret_cast<GDExtensionConstVariantPtr *>(args), argcount, r_ret._native_ptr(), &r_error);
 }
 
-void Variant::call_static(Variant::Type type, const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error) {
-	internal::gde_interface->variant_call_static(static_cast<GDExtensionVariantType>(type), method._native_ptr(), reinterpret_cast<GDExtensionConstVariantPtr *>(args), argcount, r_ret._native_ptr(), &r_error);
+void Variant::callp_static(Variant::Type type, const StringName &method, const Variant **args, int argcount, Variant &r_ret, GDExtensionCallError &r_error) {
+	internal::gdextension_interface_variant_call_static(static_cast<GDExtensionVariantType>(type), method._native_ptr(), reinterpret_cast<GDExtensionConstVariantPtr *>(args), argcount, r_ret._native_ptr(), &r_error);
 }
 
 void Variant::evaluate(const Operator &op, const Variant &a, const Variant &b, Variant &r_ret, bool &r_valid) {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_evaluate(static_cast<GDExtensionVariantOperator>(op), a._native_ptr(), b._native_ptr(), r_ret._native_ptr(), &valid);
+	internal::gdextension_interface_variant_evaluate(static_cast<GDExtensionVariantOperator>(op), a._native_ptr(), b._native_ptr(), r_ret._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 }
 
 void Variant::set(const Variant &key, const Variant &value, bool *r_valid) {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_set(_native_ptr(), key._native_ptr(), value._native_ptr(), &valid);
+	internal::gdextension_interface_variant_set(_native_ptr(), key._native_ptr(), value._native_ptr(), &valid);
 	if (r_valid) {
 		*r_valid = PtrToArg<bool>::convert(&valid);
 	}
@@ -572,27 +589,27 @@ void Variant::set(const Variant &key, const Variant &value, bool *r_valid) {
 
 void Variant::set_named(const StringName &name, const Variant &value, bool &r_valid) {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_set_named(_native_ptr(), name._native_ptr(), value._native_ptr(), &valid);
+	internal::gdextension_interface_variant_set_named(_native_ptr(), name._native_ptr(), value._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 }
 
 void Variant::set_indexed(int64_t index, const Variant &value, bool &r_valid, bool &r_oob) {
 	GDExtensionBool valid, oob;
-	internal::gde_interface->variant_set_indexed(_native_ptr(), index, value._native_ptr(), &valid, &oob);
+	internal::gdextension_interface_variant_set_indexed(_native_ptr(), index, value._native_ptr(), &valid, &oob);
 	r_valid = PtrToArg<bool>::convert(&valid);
 	r_oob = PtrToArg<bool>::convert(&oob);
 }
 
 void Variant::set_keyed(const Variant &key, const Variant &value, bool &r_valid) {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_set_keyed(_native_ptr(), key._native_ptr(), value._native_ptr(), &valid);
+	internal::gdextension_interface_variant_set_keyed(_native_ptr(), key._native_ptr(), value._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 }
 
 Variant Variant::get(const Variant &key, bool *r_valid) const {
 	Variant result;
 	GDExtensionBool valid;
-	internal::gde_interface->variant_get(_native_ptr(), key._native_ptr(), result._native_ptr(), &valid);
+	internal::gdextension_interface_variant_get(_native_ptr(), key._native_ptr(), result._native_ptr(), &valid);
 	if (r_valid) {
 		*r_valid = PtrToArg<bool>::convert(&valid);
 	}
@@ -602,7 +619,7 @@ Variant Variant::get(const Variant &key, bool *r_valid) const {
 Variant Variant::get_named(const StringName &name, bool &r_valid) const {
 	Variant result;
 	GDExtensionBool valid;
-	internal::gde_interface->variant_get_named(_native_ptr(), name._native_ptr(), result._native_ptr(), &valid);
+	internal::gdextension_interface_variant_get_named(_native_ptr(), name._native_ptr(), result._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 	return result;
 }
@@ -611,7 +628,7 @@ Variant Variant::get_indexed(int64_t index, bool &r_valid, bool &r_oob) const {
 	Variant result;
 	GDExtensionBool valid;
 	GDExtensionBool oob;
-	internal::gde_interface->variant_get_indexed(_native_ptr(), index, result._native_ptr(), &valid, &oob);
+	internal::gdextension_interface_variant_get_indexed(_native_ptr(), index, result._native_ptr(), &valid, &oob);
 	r_valid = PtrToArg<bool>::convert(&valid);
 	r_oob = PtrToArg<bool>::convert(&oob);
 	return result;
@@ -620,7 +637,7 @@ Variant Variant::get_indexed(int64_t index, bool &r_valid, bool &r_oob) const {
 Variant Variant::get_keyed(const Variant &key, bool &r_valid) const {
 	Variant result;
 	GDExtensionBool valid;
-	internal::gde_interface->variant_get_keyed(_native_ptr(), key._native_ptr(), result._native_ptr(), &valid);
+	internal::gdextension_interface_variant_get_keyed(_native_ptr(), key._native_ptr(), result._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 	return result;
 }
@@ -637,36 +654,38 @@ bool Variant::in(const Variant &index, bool *r_valid) const {
 
 bool Variant::iter_init(Variant &r_iter, bool &r_valid) const {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_iter_init(_native_ptr(), r_iter._native_ptr(), &valid);
-	return PtrToArg<bool>::convert(&valid);
+	GDExtensionBool result = internal::gdextension_interface_variant_iter_init(_native_ptr(), r_iter._native_ptr(), &valid);
+	r_valid = PtrToArg<bool>::convert(&valid);
+	return PtrToArg<bool>::convert(&result);
 }
 
 bool Variant::iter_next(Variant &r_iter, bool &r_valid) const {
 	GDExtensionBool valid;
-	internal::gde_interface->variant_iter_next(_native_ptr(), r_iter._native_ptr(), &valid);
-	return PtrToArg<bool>::convert(&valid);
+	GDExtensionBool result = internal::gdextension_interface_variant_iter_next(_native_ptr(), r_iter._native_ptr(), &valid);
+	r_valid = PtrToArg<bool>::convert(&valid);
+	return PtrToArg<bool>::convert(&result);
 }
 
 Variant Variant::iter_get(const Variant &r_iter, bool &r_valid) const {
 	Variant result;
 	GDExtensionBool valid;
-	internal::gde_interface->variant_iter_get(_native_ptr(), r_iter._native_ptr(), result._native_ptr(), &valid);
+	internal::gdextension_interface_variant_iter_get(_native_ptr(), r_iter._native_ptr(), result._native_ptr(), &valid);
 	r_valid = PtrToArg<bool>::convert(&valid);
 	return result;
 }
 
 Variant::Type Variant::get_type() const {
-	return static_cast<Variant::Type>(internal::gde_interface->variant_get_type(_native_ptr()));
+	return static_cast<Variant::Type>(internal::gdextension_interface_variant_get_type(_native_ptr()));
 }
 
 bool Variant::has_method(const StringName &method) const {
-	GDExtensionBool has = internal::gde_interface->variant_has_method(_native_ptr(), method._native_ptr());
+	GDExtensionBool has = internal::gdextension_interface_variant_has_method(_native_ptr(), method._native_ptr());
 	return PtrToArg<bool>::convert(&has);
 }
 
 bool Variant::has_key(const Variant &key, bool *r_valid) const {
 	GDExtensionBool valid;
-	GDExtensionBool has = internal::gde_interface->variant_has_key(_native_ptr(), key._native_ptr(), &valid);
+	GDExtensionBool has = internal::gdextension_interface_variant_has_key(_native_ptr(), key._native_ptr(), &valid);
 	if (r_valid) {
 		*r_valid = PtrToArg<bool>::convert(&valid);
 	}
@@ -674,33 +693,33 @@ bool Variant::has_key(const Variant &key, bool *r_valid) const {
 }
 
 bool Variant::has_member(Variant::Type type, const StringName &member) {
-	GDExtensionBool has = internal::gde_interface->variant_has_member(static_cast<GDExtensionVariantType>(type), member._native_ptr());
+	GDExtensionBool has = internal::gdextension_interface_variant_has_member(static_cast<GDExtensionVariantType>(type), member._native_ptr());
 	return PtrToArg<bool>::convert(&has);
 }
 
 uint32_t Variant::hash() const {
-	GDExtensionInt hash = internal::gde_interface->variant_hash(_native_ptr());
+	GDExtensionInt hash = internal::gdextension_interface_variant_hash(_native_ptr());
 	return PtrToArg<uint32_t>::convert(&hash);
 }
 
 uint32_t Variant::recursive_hash(int recursion_count) const {
-	GDExtensionInt hash = internal::gde_interface->variant_recursive_hash(_native_ptr(), recursion_count);
+	GDExtensionInt hash = internal::gdextension_interface_variant_recursive_hash(_native_ptr(), recursion_count);
 	return PtrToArg<uint32_t>::convert(&hash);
 }
 
 bool Variant::hash_compare(const Variant &variant) const {
-	GDExtensionBool compare = internal::gde_interface->variant_hash_compare(_native_ptr(), variant._native_ptr());
+	GDExtensionBool compare = internal::gdextension_interface_variant_hash_compare(_native_ptr(), variant._native_ptr());
 	return PtrToArg<bool>::convert(&compare);
 }
 
 bool Variant::booleanize() const {
-	GDExtensionBool booleanized = internal::gde_interface->variant_booleanize(_native_ptr());
+	GDExtensionBool booleanized = internal::gdextension_interface_variant_booleanize(_native_ptr());
 	return PtrToArg<bool>::convert(&booleanized);
 }
 
 String Variant::stringify() const {
 	String result;
-	internal::gde_interface->variant_stringify(_native_ptr(), result._native_ptr());
+	internal::gdextension_interface_variant_stringify(_native_ptr(), result._native_ptr());
 	return result;
 }
 
@@ -708,23 +727,23 @@ Variant Variant::duplicate(bool deep) const {
 	Variant result;
 	GDExtensionBool _deep;
 	PtrToArg<bool>::encode(deep, &_deep);
-	internal::gde_interface->variant_duplicate(_native_ptr(), result._native_ptr(), _deep);
+	internal::gdextension_interface_variant_duplicate(_native_ptr(), result._native_ptr(), _deep);
 	return result;
 }
 
 String Variant::get_type_name(Variant::Type type) {
 	String result;
-	internal::gde_interface->variant_get_type_name(static_cast<GDExtensionVariantType>(type), result._native_ptr());
+	internal::gdextension_interface_variant_get_type_name(static_cast<GDExtensionVariantType>(type), result._native_ptr());
 	return result;
 }
 
 bool Variant::can_convert(Variant::Type from, Variant::Type to) {
-	GDExtensionBool can = internal::gde_interface->variant_can_convert(static_cast<GDExtensionVariantType>(from), static_cast<GDExtensionVariantType>(to));
+	GDExtensionBool can = internal::gdextension_interface_variant_can_convert(static_cast<GDExtensionVariantType>(from), static_cast<GDExtensionVariantType>(to));
 	return PtrToArg<bool>::convert(&can);
 }
 
 bool Variant::can_convert_strict(Variant::Type from, Variant::Type to) {
-	GDExtensionBool can = internal::gde_interface->variant_can_convert_strict(static_cast<GDExtensionVariantType>(from), static_cast<GDExtensionVariantType>(to));
+	GDExtensionBool can = internal::gdextension_interface_variant_can_convert_strict(static_cast<GDExtensionVariantType>(from), static_cast<GDExtensionVariantType>(to));
 	return PtrToArg<bool>::convert(&can);
 }
 
@@ -775,9 +794,9 @@ void Variant::clear() {
 	};
 
 	if (unlikely(needs_deinit[get_type()])) { // Make it fast for types that don't need deinit.
-		internal::gde_interface->variant_destroy(_native_ptr());
+		internal::gdextension_interface_variant_destroy(_native_ptr());
 	}
-	internal::gde_interface->variant_new_nil(_native_ptr());
+	internal::gdextension_interface_variant_new_nil(_native_ptr());
 }
 
 } // namespace godot

test/CMakeLists.txt

@@ -36,7 +36,7 @@ set(GODOT_LINKER_FLAGS )
 
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 	# using Visual Studio C++
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /EHsc /WX") # /GF /MP
+	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /WX") # /GF /MP
 	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /DTYPED_METHOD_BIND")
 
 	if(CMAKE_BUILD_TYPE MATCHES Debug)
@@ -92,6 +92,21 @@ else()
 	endif(CMAKE_BUILD_TYPE MATCHES Debug)
 endif()
 
+# Disable exception handling. Godot doesn't use exceptions anywhere, and this
+# saves around 20% of binary size and very significant build time (GH-80513).
+option(GODOT_DISABLE_EXCEPTIONS ON "Force disabling exception handling code")
+if (GODOT_DISABLE_EXCEPTIONS)
+	if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -D_HAS_EXCEPTIONS=0")
+	else()
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-exceptions")
+	endif()
+else()
+	if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /EHsc")
+	endif()
+endif()
+
 # Get Sources
 file(GLOB_RECURSE SOURCES src/*.c**)
 file(GLOB_RECURSE HEADERS include/*.h**)

test/README.md

@@ -1,11 +1,8 @@
-# godot-cpp example / integration test
+# godot-cpp integration test
 
 This project is used to perform integration testing of the godot-cpp
 extension, to validate PRs and implemented APIs.
 
-It can also be used as a quick example of how to set up a godot-cpp
-project, both on the C++ side and in the Godot project itself.
-
 ## License
 
 This is free and unencumbered software released into the public domain.

test/SConstruct

@@ -18,14 +18,25 @@ sources = Glob("src/*.cpp")
 
 if env["platform"] == "macos":
     library = env.SharedLibrary(
-        "demo/bin/libgdexample.{}.{}.framework/libgdexample.{}.{}".format(
+        "project/bin/libgdexample.{}.{}.framework/libgdexample.{}.{}".format(
             env["platform"], env["target"], env["platform"], env["target"]
         ),
         source=sources,
     )
+elif env["platform"] == "ios":
+    if env["ios_simulator"]:
+        library = env.StaticLibrary(
+            "project/bin/libgdexample.{}.{}.simulator.a".format(env["platform"], env["target"]),
+            source=sources,
+        )
+    else:
+        library = env.StaticLibrary(
+            "project/bin/libgdexample.{}.{}.a".format(env["platform"], env["target"]),
+            source=sources,
+        )
 else:
     library = env.SharedLibrary(
-        "demo/bin/libgdexample{}{}".format(env["suffix"], env["SHLIBSUFFIX"]),
+        "project/bin/libgdexample{}{}".format(env["suffix"], env["SHLIBSUFFIX"]),
         source=sources,
     )
 

test/demo/main.gd

@@ -1,80 +0,0 @@
-extends Node
-
-func _ready():
-	# Bind signals
-	prints("Signal bind")
-	$Button.button_up.connect($Example.emit_custom_signal.bind("Button", 42))
-
-	prints("")
-
-	# To string.
-	prints("To string")
-	prints("  Example --> ", $Example.to_string())
-	prints("  ExampleMin --> ", $Example/ExampleMin.to_string())
-
-	# Call static methods.
-	prints("Static method calls")
-	prints("  static (109)", Example.test_static(9, 100));
-	Example.test_static2();
-
-	# Property list.
-	prints("Property list")
-	$Example.property_from_list = Vector3(100, 200, 300)
-	prints("  property value ", $Example.property_from_list)
-
-	# Call methods.
-	prints("Instance method calls")
-	$Example.simple_func()
-	($Example as Example).simple_const_func() # Force use of ptrcall
-	prints("  returned", $Example.return_something("some string"))
-	prints("  returned const", $Example.return_something_const())
-	var null_ref = $Example.return_empty_ref()
-	prints("  returned empty ref", null_ref)
-	var ret_ref = $Example.return_extended_ref()
-	prints("  returned ref", ret_ref.get_instance_id(), ", id:", ret_ref.get_id())
-	prints("  returned ", $Example.get_v4())
-	prints("  test node argument", $Example.test_node_argument($Example))
-
-	prints("VarArg method calls")
-	var ref = ExampleRef.new()
-	prints("  sending ref: ", ref.get_instance_id(), "returned ref: ", $Example.extended_ref_checks(ref).get_instance_id())
-	prints("  vararg args", $Example.varargs_func("some", "arguments", "to", "test"))
-	prints("  vararg_nv ret", $Example.varargs_func_nv("some", "arguments", "to", "test"))
-	$Example.varargs_func_void("some", "arguments", "to", "test")
-
-	prints("Method calls with default values")
-	prints("  defval (300)", $Example.def_args())
-	prints("  defval (250)", $Example.def_args(50))
-	prints("  defval (150)", $Example.def_args(50, 100))
-
-	prints("Array and Dictionary")
-	prints("  test array", $Example.test_array())
-	prints("  test tarray", $Example.test_tarray())
-	prints("  test dictionary", $Example.test_dictionary())
-	var array: Array[int] = [1, 2, 3]
-	$Example.test_tarray_arg(array)
-
-	prints("String += operator")
-	prints("  test string +=", $Example.test_string_ops())
-
-	prints("PackedArray iterators")
-	prints("  test packed array iterators", $Example.test_vector_ops())
-
-	prints("Properties")
-	prints("  custom position is", $Example.group_subgroup_custom_position)
-	$Example.group_subgroup_custom_position = Vector2(50, 50)
-	prints("  custom position now is", $Example.group_subgroup_custom_position)
-
-	prints("Constants")
-	prints("  FIRST", $Example.FIRST)
-	prints("  ANSWER_TO_EVERYTHING", $Example.ANSWER_TO_EVERYTHING)
-	prints("  CONSTANT_WITHOUT_ENUM", $Example.CONSTANT_WITHOUT_ENUM)
-
-	prints("BitFields")
-	prints("  FLAG_ONE", Example.FLAG_ONE)
-	prints("  FLAG_TWO", Example.FLAG_TWO)
-	prints("  returned BitField", $Example.test_bitfield(0))
-	prints("  returned BitField", $Example.test_bitfield(Example.FLAG_ONE | Example.FLAG_TWO))
-
-func _on_Example_custom_signal(signal_name, value):
-	prints("Example emitted:", signal_name, value)

test/generate_xcframework.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+scons arch=universal ios_simulator=yes platform=ios target=$1 $2
+scons arch=arm64 ios_simulator=no platform=ios target=$1 $2
+
+xcodebuild -create-xcframework -library ./project/bin/libgdexample.ios.$1.a -library ./project/bin/libgdexample.ios.$1.simulator.a -output ./project/bin/libgdexample.ios.$1.xcframework
+xcodebuild -create-xcframework -library ../bin/libgodot-cpp.ios.$1.arm64.a -library ../bin/libgodot-cpp.ios.$1.universal.simulator.a  -output ./project/bin/libgodot-cpp.ios.$1.xcframework

test/project/default_env.tres

@@ -4,4 +4,4 @@
 
 [resource]
 background_mode = 2
-sky = SubResource( "1" )
+sky = SubResource("1")

test/project/example.gdextension

@@ -1,6 +1,7 @@
 [configuration]
 
 entry_symbol = "example_library_init"
+compatibility_minimum = "4.1"
 
 [libraries]
 
@@ -10,8 +11,14 @@ windows.debug.x86_32 = "res://bin/libgdexample.windows.template_debug.x86_32.dll
 windows.release.x86_32 = "res://bin/libgdexample.windows.template_release.x86_32.dll"
 windows.debug.x86_64 = "res://bin/libgdexample.windows.template_debug.x86_64.dll"
 windows.release.x86_64 = "res://bin/libgdexample.windows.template_release.x86_64.dll"
+windows.debug.arm64 = "res://bin/libgdexample.windows.template_debug.arm64.dll"
+windows.release.arm64 = "res://bin/libgdexample.windows.template_release.arm64.dll"
+linux.debug.x86_32 = "res://bin/libgdexample.linux.template_debug.x86_32.so"
+linux.release.x86_32 = "res://bin/libgdexample.linux.template_release.x86_32.so"
 linux.debug.x86_64 = "res://bin/libgdexample.linux.template_debug.x86_64.so"
 linux.release.x86_64 = "res://bin/libgdexample.linux.template_release.x86_64.so"
+linux.debug.arm32 = "res://bin/libgdexample.linux.template_debug.arm32.so"
+linux.release.arm32 = "res://bin/libgdexample.linux.template_release.arm32.so"
 linux.debug.arm64 = "res://bin/libgdexample.linux.template_debug.arm64.so"
 linux.release.arm64 = "res://bin/libgdexample.linux.template_release.arm64.so"
 linux.debug.rv64 = "res://bin/libgdexample.linux.template_debug.rv64.so"
@@ -20,3 +27,15 @@ android.debug.x86_64 = "res://bin/libgdexample.android.template_debug.x86_64.so"
 android.release.x86_64 = "res://bin/libgdexample.android.template_release.x86_64.so"
 android.debug.arm64 = "res://bin/libgdexample.android.template_debug.arm64.so"
 android.release.arm64 = "res://bin/libgdexample.android.template_release.arm64.so"
+ios.debug = "res://bin/libgdexample.ios.template_debug.xcframework"
+ios.release = "res://bin/libgdexample.ios.template_release.xcframework"
+web.debug.wasm32 = "res://bin/libgdexample.web.template_debug.wasm32.wasm"
+web.release.wasm32 = "res://bin/libgdexample.web.template_release.wasm32.wasm"
+
+[dependencies]
+ios.debug = {
+  "res://bin/libgodot-cpp.ios.template_debug.xcframework": ""
+}
+ios.release = {
+  "res://bin/libgodot-cpp.ios.template_release.xcframework": ""
+}

test/project/icon.png.import

@@ -16,9 +16,9 @@ dest_files=["res://.godot/imported/icon.png-487276ed1e3a0c39cad0279d744ee560.cte
 [params]
 
 compress/mode=0
+compress/high_quality=false
 compress/lossy_quality=0.7
 compress/hdr_compression=1
-compress/bptc_ldr=0
 compress/normal_map=0
 compress/channel_pack=0
 mipmaps/generate=false

test/project/main.gd

@@ -0,0 +1,247 @@
+extends "res://test_base.gd"
+
+var custom_signal_emitted = null
+
+class TestClass:
+	func test(p_msg: String) -> String:
+		return p_msg + " world"
+
+func _ready():
+	var example: Example = $Example
+
+	# Signal.
+	example.emit_custom_signal("Button", 42)
+	assert_equal(custom_signal_emitted, ["Button", 42])
+
+	# To string.
+	assert_equal(example.to_string(),'Example:[ GDExtension::Example <--> Instance ID:%s ]' % example.get_instance_id())
+	# It appears there's a bug with instance ids :-(
+	#assert_equal($Example/ExampleMin.to_string(), 'ExampleMin:[Wrapped:%s]' % $Example/ExampleMin.get_instance_id())
+
+	# Call static methods.
+	assert_equal(Example.test_static(9, 100), 109);
+	# It's void and static, so all we know is that it didn't crash.
+	Example.test_static2()
+
+	# Property list.
+	example.property_from_list = Vector3(100, 200, 300)
+	assert_equal(example.property_from_list, Vector3(100, 200, 300))
+	var prop_list = example.get_property_list()
+	for prop_info in prop_list:
+		if prop_info['name'] == 'mouse_filter':
+			assert_equal(prop_info['usage'], PROPERTY_USAGE_NO_EDITOR)
+
+	# Call simple methods.
+	example.simple_func()
+	assert_equal(custom_signal_emitted, ['simple_func', 3])
+	example.simple_const_func()
+	assert_equal(custom_signal_emitted, ['simple_const_func', 4])
+
+	# Pass custom reference.
+	assert_equal(example.custom_ref_func(null), -1)
+	var ref1 = ExampleRef.new()
+	ref1.id = 27
+	assert_equal(example.custom_ref_func(ref1), 27)
+	ref1.id += 1;
+	assert_equal(example.custom_const_ref_func(ref1), 28)
+
+	# Pass core reference.
+	assert_equal(example.image_ref_func(null), "invalid")
+	assert_equal(example.image_const_ref_func(null), "invalid")
+	var image = Image.new()
+	assert_equal(example.image_ref_func(image), "valid")
+	assert_equal(example.image_const_ref_func(image), "valid")
+
+	# Return values.
+	assert_equal(example.return_something("some string"), "some string42")
+	assert_equal(example.return_something_const(), get_viewport())
+	var null_ref = example.return_empty_ref()
+	assert_equal(null_ref, null)
+	var ret_ref = example.return_extended_ref()
+	assert_not_equal(ret_ref.get_instance_id(), 0)
+	assert_equal(ret_ref.get_id(), 0)
+	assert_equal(example.get_v4(), Vector4(1.2, 3.4, 5.6, 7.8))
+	assert_equal(example.test_node_argument(example), example)
+
+	# VarArg method calls.
+	var var_ref = ExampleRef.new()
+	assert_not_equal(example.extended_ref_checks(var_ref).get_instance_id(), var_ref.get_instance_id())
+	assert_equal(example.varargs_func("some", "arguments", "to", "test"), 4)
+	assert_equal(example.varargs_func_nv("some", "arguments", "to", "test"), 46)
+	example.varargs_func_void("some", "arguments", "to", "test")
+	assert_equal(custom_signal_emitted, ["varargs_func_void", 5])
+
+	# Method calls with default values.
+	assert_equal(example.def_args(), 300)
+	assert_equal(example.def_args(50), 250)
+	assert_equal(example.def_args(50, 100), 150)
+
+	# Array and Dictionary
+	assert_equal(example.test_array(), [1, 2])
+	assert_equal(example.test_tarray(), [ Vector2(1, 2), Vector2(2, 3) ])
+	assert_equal(example.test_dictionary(), {"hello": "world", "foo": "bar"})
+	var array: Array[int] = [1, 2, 3]
+	assert_equal(example.test_tarray_arg(array), 6)
+
+	example.callable_bind()
+	assert_equal(custom_signal_emitted, ["bound", 11])
+
+	# String += operator
+	assert_equal(example.test_string_ops(), "ABCĎE")
+
+	# UtilityFunctions::str()
+	assert_equal(example.test_str_utility(), "Hello, World! The answer is 42")
+
+	# Test converting string to char* and doing comparison.
+	assert_equal(example.test_string_is_fourty_two("blah"), false)
+	assert_equal(example.test_string_is_fourty_two("fourty two"), true)
+
+	# String::resize().
+	assert_equal(example.test_string_resize("What"), "What!?")
+
+	# mp_callable() with void method.
+	var mp_callable: Callable = example.test_callable_mp()
+	assert_equal(mp_callable.is_valid(), true)
+	mp_callable.call(example, "void", 36)
+	assert_equal(custom_signal_emitted, ["unbound_method1: Example - void", 36])
+
+	# Check that it works with is_connected().
+	assert_equal(example.renamed.is_connected(mp_callable), false)
+	example.renamed.connect(mp_callable)
+	assert_equal(example.renamed.is_connected(mp_callable), true)
+	# Make sure a new object is still treated as equivalent.
+	assert_equal(example.renamed.is_connected(example.test_callable_mp()), true)
+	assert_equal(mp_callable.hash(), example.test_callable_mp().hash())
+	example.renamed.disconnect(mp_callable)
+	assert_equal(example.renamed.is_connected(mp_callable), false)
+
+	# mp_callable() with return value.
+	var mp_callable_ret: Callable = example.test_callable_mp_ret()
+	assert_equal(mp_callable_ret.call(example, "test", 77), "unbound_method2: Example - test - 77")
+
+	# mp_callable() with const method and return value.
+	var mp_callable_retc: Callable = example.test_callable_mp_retc()
+	assert_equal(mp_callable_retc.call(example, "const", 101), "unbound_method3: Example - const - 101")
+
+	# mp_callable_static() with void method.
+	var mp_callable_static: Callable = example.test_callable_mp_static()
+	mp_callable_static.call(example, "static", 83)
+	assert_equal(custom_signal_emitted, ["unbound_static_method1: Example - static", 83])
+
+	# Check that it works with is_connected().
+	assert_equal(example.renamed.is_connected(mp_callable_static), false)
+	example.renamed.connect(mp_callable_static)
+	assert_equal(example.renamed.is_connected(mp_callable_static), true)
+	# Make sure a new object is still treated as equivalent.
+	assert_equal(example.renamed.is_connected(example.test_callable_mp_static()), true)
+	assert_equal(mp_callable_static.hash(), example.test_callable_mp_static().hash())
+	example.renamed.disconnect(mp_callable_static)
+	assert_equal(example.renamed.is_connected(mp_callable_static), false)
+
+	# mp_callable_static() with return value.
+	var mp_callable_static_ret: Callable = example.test_callable_mp_static_ret()
+	assert_equal(mp_callable_static_ret.call(example, "static-ret", 84), "unbound_static_method2: Example - static-ret - 84")
+
+	# CallableCustom.
+	var custom_callable: Callable = example.test_custom_callable();
+	assert_equal(custom_callable.is_custom(), true);
+	assert_equal(custom_callable.is_valid(), true);
+	assert_equal(custom_callable.call(), "Hi")
+	assert_equal(custom_callable.hash(), 27);
+	assert_equal(custom_callable.get_object(), null);
+	assert_equal(custom_callable.get_method(), "");
+	assert_equal(str(custom_callable), "<MyCallableCustom>");
+
+	# PackedArray iterators
+	assert_equal(example.test_vector_ops(), 105)
+
+	# Properties.
+	assert_equal(example.group_subgroup_custom_position, Vector2(0, 0))
+	example.group_subgroup_custom_position = Vector2(50, 50)
+	assert_equal(example.group_subgroup_custom_position, Vector2(50, 50))
+
+	# Test Object::cast_to<>() and that correct wrappers are being used.
+	var control = Control.new()
+	var sprite = Sprite2D.new()
+	var example_ref = ExampleRef.new()
+
+	assert_equal(example.test_object_cast_to_node(control), true)
+	assert_equal(example.test_object_cast_to_control(control), true)
+	assert_equal(example.test_object_cast_to_example(control), false)
+
+	assert_equal(example.test_object_cast_to_node(example), true)
+	assert_equal(example.test_object_cast_to_control(example), true)
+	assert_equal(example.test_object_cast_to_example(example), true)
+
+	assert_equal(example.test_object_cast_to_node(sprite), true)
+	assert_equal(example.test_object_cast_to_control(sprite), false)
+	assert_equal(example.test_object_cast_to_example(sprite), false)
+
+	assert_equal(example.test_object_cast_to_node(example_ref), false)
+	assert_equal(example.test_object_cast_to_control(example_ref), false)
+	assert_equal(example.test_object_cast_to_example(example_ref), false)
+
+	control.queue_free()
+	sprite.queue_free()
+
+	# Test conversions to and from Variant.
+	assert_equal(example.test_variant_vector2i_conversion(Vector2i(1, 1)), Vector2i(1, 1))
+	assert_equal(example.test_variant_vector2i_conversion(Vector2(1.0, 1.0)), Vector2i(1, 1))
+	assert_equal(example.test_variant_int_conversion(10), 10)
+	assert_equal(example.test_variant_int_conversion(10.0), 10)
+	assert_equal(example.test_variant_float_conversion(10.0), 10.0)
+	assert_equal(example.test_variant_float_conversion(10), 10.0)
+
+	# Test that ptrcalls from GDExtension to the engine are correctly encoding Object and RefCounted.
+	var new_node = Node.new()
+	example.test_add_child(new_node)
+	assert_equal(new_node.get_parent(), example)
+
+	var new_tileset = TileSet.new()
+	var new_tilemap = TileMap.new()
+	example.test_set_tileset(new_tilemap, new_tileset)
+	assert_equal(new_tilemap.tile_set, new_tileset)
+	new_tilemap.queue_free()
+
+	# Test variant call.
+	var test_obj = TestClass.new()
+	assert_equal(example.test_variant_call(test_obj), "hello world")
+
+	# Constants.
+	assert_equal(Example.FIRST, 0)
+	assert_equal(Example.ANSWER_TO_EVERYTHING, 42)
+	assert_equal(Example.CONSTANT_WITHOUT_ENUM, 314)
+
+	# BitFields.
+	assert_equal(Example.FLAG_ONE, 1)
+	assert_equal(Example.FLAG_TWO, 2)
+	assert_equal(example.test_bitfield(0), 0)
+	assert_equal(example.test_bitfield(Example.FLAG_ONE | Example.FLAG_TWO), 3)
+
+	# Test variant iterator.
+	assert_equal(example.test_variant_iterator([10, 20, 30]), [15, 25, 35])
+	assert_equal(example.test_variant_iterator(null), "iter_init: not valid")
+
+	# RPCs.
+	assert_equal(example.return_last_rpc_arg(), 0)
+	example.test_rpc(42)
+	assert_equal(example.return_last_rpc_arg(), 42)
+	example.test_send_rpc(100)
+	assert_equal(example.return_last_rpc_arg(), 100)
+
+	# Virtual method.
+	var event = InputEventKey.new()
+	event.key_label = KEY_H
+	event.unicode = 72
+	get_viewport().push_input(event)
+	assert_equal(custom_signal_emitted, ["_input: H", 72])
+
+	# Check NOTIFICATION_POST_INITIALIZED, both when created from GDScript and godot-cpp.
+	var new_example_ref = ExampleRef.new()
+	assert_equal(new_example_ref.was_post_initialized(), true)
+	assert_equal(example.test_post_initialize(), true)
+
+	exit_with_status()
+
+func _on_Example_custom_signal(signal_name, value):
+	custom_signal_emitted = [signal_name, value]

test/project/main.tscn

@@ -1,9 +1,9 @@
 [gd_scene load_steps=2 format=3 uid="uid://dmx2xuigcpvt4"]
 
-[ext_resource type="Script" path="res://main.gd" id="1_c326s"]
+[ext_resource type="Script" path="res://main.gd" id="1_qesh5"]
 
 [node name="Node" type="Node"]
-script = ExtResource("1_c326s")
+script = ExtResource("1_qesh5")
 
 [node name="Example" type="Example" parent="."]
 

test/project/project.godot

@@ -12,7 +12,7 @@ config_version=5
 
 config/name="GDExtension Test Project"
 run/main_scene="res://main.tscn"
-config/features=PackedStringArray("4.0")
+config/features=PackedStringArray("4.2")
 config/icon="res://icon.png"
 
 [native_extensions]
@@ -21,4 +21,5 @@ paths=["res://example.gdextension"]
 
 [rendering]
 
+textures/vram_compression/import_etc2_astc=true
 environment/defaults/default_environment="res://default_env.tres"

test/project/test_base.gd

@@ -0,0 +1,59 @@
+extends Node
+
+var test_passes := 0
+var test_failures := 0
+
+func __get_stack_frame():
+	var me = get_script()
+	for s in get_stack():
+		if s.source == me.resource_path:
+			return s
+	return null
+
+func __assert_pass():
+	test_passes += 1
+
+func __assert_fail():
+	test_failures += 1
+	var s = __get_stack_frame()
+	if s != null:
+		print_rich ("[color=red] == FAILURE: In function %s() from '%s' on line %s[/color]" % [s.function, s.source, s.line])
+	else:
+		print_rich ("[color=red] == FAILURE (run with --debug to get more information!) ==[/color]")
+
+func assert_equal(actual, expected):
+	if actual == expected:
+		__assert_pass()
+	else:
+		__assert_fail()
+		print ("    |-> Expected '%s' but got '%s'" % [expected, actual])
+
+func assert_true(v):
+	assert_equal(v, true)
+
+func assert_false(v):
+	assert_equal(v, false)
+
+func assert_not_equal(actual, expected):
+	if actual != expected:
+		__assert_pass()
+	else:
+		__assert_fail()
+		print ("    |-> Expected '%s' NOT to equal '%s'" % [expected, actual])
+
+func exit_with_status() -> void:
+	var success: bool = (test_failures == 0)
+	print ("")
+	print_rich ("[color=%s] ==== TESTS FINISHED ==== [/color]" % ("green" if success else "red"))
+	print ("")
+	print_rich ("   PASSES: [color=green]%s[/color]" % test_passes)
+	print_rich ("   FAILURES: [color=red]%s[/color]" % test_failures)
+	print ("")
+
+	if success:
+		print_rich("[color=green] ******** PASSED ******** [/color]")
+	else:
+		print_rich("[color=red] ******** FAILED ********[/color]")
+	print("")
+
+	get_tree().quit(0 if success else 1)

test/run-tests.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+GODOT=${GODOT:-godot}
+
+END_STRING="==== TESTS FINISHED ===="
+FAILURE_STRING="******** FAILED ********"
+
+OUTPUT=$($GODOT --path project --debug --headless --quit)
+ERRCODE=$?
+
+echo "$OUTPUT"
+echo
+
+if ! echo "$OUTPUT" | grep -e "$END_STRING" >/dev/null; then
+    echo "ERROR: Tests failed to complete"
+    exit 1
+fi
+
+if echo "$OUTPUT" | grep -e "$FAILURE_STRING" >/dev/null; then
+    exit 1
+fi
+
+# Success!
+exit 0

test/src/example.cpp

@@ -9,31 +9,80 @@
 
 #include <godot_cpp/classes/global_constants.hpp>
 #include <godot_cpp/classes/label.hpp>
+#include <godot_cpp/classes/multiplayer_api.hpp>
+#include <godot_cpp/classes/multiplayer_peer.hpp>
 #include <godot_cpp/variant/utility_functions.hpp>
 
 using namespace godot;
 
-int ExampleRef::instance_count = 0;
-int ExampleRef::last_id = 0;
+class MyCallableCustom : public CallableCustom {
+public:
+	virtual uint32_t hash() const {
+		return 27;
+	}
+
+	virtual String get_as_text() const {
+		return "<MyCallableCustom>";
+	}
+
+	static bool compare_equal_func(const CallableCustom *p_a, const CallableCustom *p_b) {
+		return p_a == p_b;
+	}
+
+	virtual CompareEqualFunc get_compare_equal_func() const {
+		return &MyCallableCustom::compare_equal_func;
+	}
+
+	static bool compare_less_func(const CallableCustom *p_a, const CallableCustom *p_b) {
+		return (void *)p_a < (void *)p_b;
+	}
+
+	virtual CompareLessFunc get_compare_less_func() const {
+		return &MyCallableCustom::compare_less_func;
+	}
+
+	bool is_valid() const {
+		return true;
+	}
+
+	virtual ObjectID get_object() const {
+		return ObjectID();
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const {
+		r_return_value = "Hi";
+		r_call_error.error = GDEXTENSION_CALL_OK;
+	}
+};
+
+void ExampleRef::set_id(int p_id) {
+	id = p_id;
+}
 
 int ExampleRef::get_id() const {
 	return id;
 }
 
+void ExampleRef::_notification(int p_what) {
+	if (p_what == NOTIFICATION_POSTINITIALIZE) {
+		post_initialized = true;
+	}
+}
+
 void ExampleRef::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_id", "id"), &ExampleRef::set_id);
 	ClassDB::bind_method(D_METHOD("get_id"), &ExampleRef::get_id);
+
+	ClassDB::bind_method(D_METHOD("was_post_initialized"), &ExampleRef::was_post_initialized);
+
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "id"), "set_id", "get_id");
 }
 
 ExampleRef::ExampleRef() {
-	id = ++last_id;
-	instance_count++;
-
-	UtilityFunctions::print("ExampleRef ", itos(id), " created, current instance count: ", itos(instance_count));
+	id = 0;
 }
 
 ExampleRef::~ExampleRef() {
-	instance_count--;
-	UtilityFunctions::print("ExampleRef ", itos(id), " destroyed, current instance count: ", itos(instance_count));
 }
 
 int Example::test_static(int p_a, int p_b) {
@@ -41,7 +90,7 @@ int Example::test_static(int p_a, int p_b) {
 }
 
 void Example::test_static2() {
-	UtilityFunctions::print("  void static");
+	//UtilityFunctions::print("  void static");
 }
 
 int Example::def_args(int p_a, int p_b) {
@@ -49,7 +98,15 @@ int Example::def_args(int p_a, int p_b) {
 }
 
 void Example::_notification(int p_what) {
-	UtilityFunctions::print("Notification: ", String::num(p_what));
+	if (p_what == NOTIFICATION_READY) {
+		Dictionary opts;
+		opts["rpc_mode"] = MultiplayerAPI::RPC_MODE_AUTHORITY;
+		opts["transfer_mode"] = MultiplayerPeer::TRANSFER_MODE_RELIABLE;
+		opts["call_local"] = true;
+		opts["channel"] = 0;
+		rpc_config("test_rpc", opts);
+	}
+	//UtilityFunctions::print("Notification: ", String::num(p_what));
 }
 
 bool Example::_set(const StringName &p_name, const Variant &p_value) {
@@ -108,10 +165,22 @@ bool Example::_property_get_revert(const StringName &p_name, Variant &r_property
 	}
 };
 
+void Example::_validate_property(PropertyInfo &p_property) const {
+	String name = p_property.name;
+	// Test hiding the "mouse_filter" property from the editor.
+	if (name == "mouse_filter") {
+		p_property.usage = PROPERTY_USAGE_NO_EDITOR;
+	}
+}
+
 void Example::_bind_methods() {
 	// Methods.
 	ClassDB::bind_method(D_METHOD("simple_func"), &Example::simple_func);
 	ClassDB::bind_method(D_METHOD("simple_const_func"), &Example::simple_const_func);
+	ClassDB::bind_method(D_METHOD("custom_ref_func", "ref"), &Example::custom_ref_func);
+	ClassDB::bind_method(D_METHOD("custom_const_ref_func", "ref"), &Example::custom_const_ref_func);
+	ClassDB::bind_method(D_METHOD("image_ref_func", "image"), &Example::image_ref_func);
+	ClassDB::bind_method(D_METHOD("image_const_ref_func", "image"), &Example::image_const_ref_func);
 	ClassDB::bind_method(D_METHOD("return_something"), &Example::return_something);
 	ClassDB::bind_method(D_METHOD("return_something_const"), &Example::return_something_const);
 	ClassDB::bind_method(D_METHOD("return_empty_ref"), &Example::return_empty_ref);
@@ -124,11 +193,42 @@ void Example::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("test_dictionary"), &Example::test_dictionary);
 	ClassDB::bind_method(D_METHOD("test_node_argument"), &Example::test_node_argument);
 	ClassDB::bind_method(D_METHOD("test_string_ops"), &Example::test_string_ops);
+	ClassDB::bind_method(D_METHOD("test_str_utility"), &Example::test_str_utility);
+	ClassDB::bind_method(D_METHOD("test_string_is_fourty_two"), &Example::test_string_is_fourty_two);
+	ClassDB::bind_method(D_METHOD("test_string_resize"), &Example::test_string_resize);
 	ClassDB::bind_method(D_METHOD("test_vector_ops"), &Example::test_vector_ops);
 
+	ClassDB::bind_method(D_METHOD("test_object_cast_to_node", "object"), &Example::test_object_cast_to_node);
+	ClassDB::bind_method(D_METHOD("test_object_cast_to_control", "object"), &Example::test_object_cast_to_control);
+	ClassDB::bind_method(D_METHOD("test_object_cast_to_example", "object"), &Example::test_object_cast_to_example);
+
+	ClassDB::bind_method(D_METHOD("test_variant_vector2i_conversion", "variant"), &Example::test_variant_vector2i_conversion);
+	ClassDB::bind_method(D_METHOD("test_variant_int_conversion", "variant"), &Example::test_variant_int_conversion);
+	ClassDB::bind_method(D_METHOD("test_variant_float_conversion", "variant"), &Example::test_variant_float_conversion);
+
+	ClassDB::bind_method(D_METHOD("test_add_child", "node"), &Example::test_add_child);
+	ClassDB::bind_method(D_METHOD("test_set_tileset", "tilemap", "tileset"), &Example::test_set_tileset);
+
+	ClassDB::bind_method(D_METHOD("test_variant_call", "variant"), &Example::test_variant_call);
+
+	ClassDB::bind_method(D_METHOD("test_callable_mp"), &Example::test_callable_mp);
+	ClassDB::bind_method(D_METHOD("test_callable_mp_ret"), &Example::test_callable_mp_ret);
+	ClassDB::bind_method(D_METHOD("test_callable_mp_retc"), &Example::test_callable_mp_retc);
+	ClassDB::bind_method(D_METHOD("test_callable_mp_static"), &Example::test_callable_mp_static);
+	ClassDB::bind_method(D_METHOD("test_callable_mp_static_ret"), &Example::test_callable_mp_static_ret);
+	ClassDB::bind_method(D_METHOD("test_custom_callable"), &Example::test_custom_callable);
+
 	ClassDB::bind_method(D_METHOD("test_bitfield", "flags"), &Example::test_bitfield);
 
+	ClassDB::bind_method(D_METHOD("test_variant_iterator", "input"), &Example::test_variant_iterator);
+
+	ClassDB::bind_method(D_METHOD("test_rpc", "value"), &Example::test_rpc);
+	ClassDB::bind_method(D_METHOD("test_send_rpc", "value"), &Example::test_send_rpc);
+	ClassDB::bind_method(D_METHOD("return_last_rpc_arg"), &Example::return_last_rpc_arg);
+
 	ClassDB::bind_method(D_METHOD("def_args", "a", "b"), &Example::def_args, DEFVAL(100), DEFVAL(200));
+	ClassDB::bind_method(D_METHOD("callable_bind"), &Example::callable_bind);
+	ClassDB::bind_method(D_METHOD("test_post_initialize"), &Example::test_post_initialize);
 
 	ClassDB::bind_static_method("Example", D_METHOD("test_static", "a", "b"), &Example::test_static);
 	ClassDB::bind_static_method("Example", D_METHOD("test_static2"), &Example::test_static2);
@@ -179,29 +279,43 @@ void Example::_bind_methods() {
 }
 
 Example::Example() {
-	UtilityFunctions::print("Constructor.");
+	//UtilityFunctions::print("Constructor.");
 }
 
 Example::~Example() {
-	UtilityFunctions::print("Destructor.");
+	//UtilityFunctions::print("Destructor.");
 }
 
 // Methods.
 void Example::simple_func() {
-	UtilityFunctions::print("  Simple func called.");
+	emit_custom_signal("simple_func", 3);
 }
 
 void Example::simple_const_func() const {
-	UtilityFunctions::print("  Simple const func called.");
+	((Example *)this)->emit_custom_signal("simple_const_func", 4);
+}
+
+int Example::custom_ref_func(Ref<ExampleRef> p_ref) {
+	return p_ref.is_valid() ? p_ref->get_id() : -1;
+}
+
+int Example::custom_const_ref_func(const Ref<ExampleRef> &p_ref) {
+	return p_ref.is_valid() ? p_ref->get_id() : -1;
+}
+
+String Example::image_ref_func(Ref<Image> p_image) {
+	return p_image.is_valid() ? String("valid") : String("invalid");
+}
+
+String Example::image_const_ref_func(const Ref<Image> &p_image) {
+	return p_image.is_valid() ? String("valid") : String("invalid");
 }
 
 String Example::return_something(const String &base) {
-	UtilityFunctions::print("  Return something called.");
-	return base;
+	return base + String("42");
 }
 
 Viewport *Example::return_something_const() const {
-	UtilityFunctions::print("  Return something const called.");
 	if (is_inside_tree()) {
 		Viewport *result = get_viewport();
 		return result;
@@ -221,32 +335,23 @@ ExampleRef *Example::return_extended_ref() const {
 	return memnew(ExampleRef());
 }
 
-Example *Example::test_node_argument(Example *p_node) const {
-	UtilityFunctions::print("  Test node argument called with ", p_node ? String::num(p_node->get_instance_id()) : "null");
-	return p_node;
-}
-
 Ref<ExampleRef> Example::extended_ref_checks(Ref<ExampleRef> p_ref) const {
 	// This is therefor the prefered way of instancing and returning a refcounted object:
 	Ref<ExampleRef> ref;
 	ref.instantiate();
-
-	UtilityFunctions::print("  Example ref checks called with value: ", p_ref->get_instance_id(), ", returning value: ", ref->get_instance_id());
 	return ref;
 }
 
 Variant Example::varargs_func(const Variant **args, GDExtensionInt arg_count, GDExtensionCallError &error) {
-	UtilityFunctions::print("  Varargs (Variant return) called with ", String::num((double)arg_count), " arguments");
 	return arg_count;
 }
 
 int Example::varargs_func_nv(const Variant **args, GDExtensionInt arg_count, GDExtensionCallError &error) {
-	UtilityFunctions::print("  Varargs (int return) called with ", String::num((double)arg_count), " arguments");
-	return 42;
+	return 42 + arg_count;
 }
 
 void Example::varargs_func_void(const Variant **args, GDExtensionInt arg_count, GDExtensionCallError &error) {
-	UtilityFunctions::print("  Varargs (no return) called with ", String::num((double)arg_count), " arguments");
+	emit_custom_signal("varargs_func_void", arg_count + 1);
 }
 
 void Example::emit_custom_signal(const String &name, int value) {
@@ -272,6 +377,24 @@ String Example::test_string_ops() const {
 	return s;
 }
 
+String Example::test_str_utility() const {
+	return UtilityFunctions::str("Hello, ", "World", "! The answer is ", 42);
+}
+
+bool Example::test_string_is_fourty_two(const String &p_string) const {
+	return strcmp(p_string.utf8().ptr(), "fourty two") == 0;
+}
+
+String Example::test_string_resize(String p_string) const {
+	int orig_len = p_string.length();
+	p_string.resize(orig_len + 3);
+	char32_t *data = p_string.ptrw();
+	data[orig_len + 0] = '!';
+	data[orig_len + 1] = '?';
+	data[orig_len + 2] = '\0';
+	return p_string;
+}
+
 int Example::test_vector_ops() const {
 	PackedInt32Array arr;
 	arr.push_back(10);
@@ -285,10 +408,74 @@ int Example::test_vector_ops() const {
 	return ret;
 }
 
-void Example::test_tarray_arg(const TypedArray<int64_t> &p_array) {
+Callable Example::test_callable_mp() {
+	return callable_mp(this, &Example::unbound_method1);
+}
+
+Callable Example::test_callable_mp_ret() {
+	return callable_mp(this, &Example::unbound_method2);
+}
+
+Callable Example::test_callable_mp_retc() const {
+	return callable_mp(this, &Example::unbound_method3);
+}
+
+Callable Example::test_callable_mp_static() const {
+	return callable_mp_static(&Example::unbound_static_method1);
+}
+
+Callable Example::test_callable_mp_static_ret() const {
+	return callable_mp_static(&Example::unbound_static_method2);
+}
+
+Callable Example::test_custom_callable() const {
+	return Callable(memnew(MyCallableCustom));
+}
+
+void Example::unbound_method1(Object *p_object, String p_string, int p_int) {
+	String test = "unbound_method1: ";
+	test += p_object->get_class();
+	test += " - " + p_string;
+	emit_custom_signal(test, p_int);
+}
+
+String Example::unbound_method2(Object *p_object, String p_string, int p_int) {
+	String test = "unbound_method2: ";
+	test += p_object->get_class();
+	test += " - " + p_string;
+	test += " - " + itos(p_int);
+	return test;
+}
+
+String Example::unbound_method3(Object *p_object, String p_string, int p_int) const {
+	String test = "unbound_method3: ";
+	test += p_object->get_class();
+	test += " - " + p_string;
+	test += " - " + itos(p_int);
+	return test;
+}
+
+void Example::unbound_static_method1(Example *p_object, String p_string, int p_int) {
+	String test = "unbound_static_method1: ";
+	test += p_object->get_class();
+	test += " - " + p_string;
+	p_object->emit_custom_signal(test, p_int);
+}
+
+String Example::unbound_static_method2(Object *p_object, String p_string, int p_int) {
+	String test = "unbound_static_method2: ";
+	test += p_object->get_class();
+	test += " - " + p_string;
+	test += " - " + itos(p_int);
+	return test;
+}
+
+int Example::test_tarray_arg(const TypedArray<int64_t> &p_array) {
+	int sum = 0;
 	for (int i = 0; i < p_array.size(); i++) {
-		UtilityFunctions::print(p_array[i]);
+		sum += (int)p_array[i];
 	}
+	return sum;
 }
 
 TypedArray<Vector2> Example::test_tarray() const {
@@ -310,11 +497,102 @@ Dictionary Example::test_dictionary() const {
 	return dict;
 }
 
+Example *Example::test_node_argument(Example *p_node) const {
+	return p_node;
+}
+
+bool Example::test_object_cast_to_node(Object *p_object) const {
+	return Object::cast_to<Node>(p_object) != nullptr;
+}
+
+bool Example::test_object_cast_to_control(Object *p_object) const {
+	return Object::cast_to<Control>(p_object) != nullptr;
+}
+
+bool Example::test_object_cast_to_example(Object *p_object) const {
+	return Object::cast_to<Example>(p_object) != nullptr;
+}
+
+Vector2i Example::test_variant_vector2i_conversion(const Variant &p_variant) const {
+	return p_variant;
+}
+
+int Example::test_variant_int_conversion(const Variant &p_variant) const {
+	return p_variant;
+}
+
+float Example::test_variant_float_conversion(const Variant &p_variant) const {
+	return p_variant;
+}
+
+void Example::test_add_child(Node *p_node) {
+	add_child(p_node);
+}
+
+void Example::test_set_tileset(TileMap *p_tilemap, const Ref<TileSet> &p_tileset) const {
+	p_tilemap->set_tileset(p_tileset);
+}
+
+Variant Example::test_variant_call(Variant p_variant) {
+	return p_variant.call("test", "hello");
+}
+
 BitField<Example::Flags> Example::test_bitfield(BitField<Flags> flags) {
-	UtilityFunctions::print("  Got BitField: ", String::num_int64(flags));
 	return flags;
 }
 
+Variant Example::test_variant_iterator(const Variant &p_input) {
+	Array output;
+
+	Variant iter;
+
+	bool is_init_valid = true;
+	if (!p_input.iter_init(iter, is_init_valid)) {
+		if (!is_init_valid) {
+			return "iter_init: not valid";
+		}
+		return output;
+	}
+
+	bool is_iter_next_valid = true;
+	bool is_iter_get_valid = true;
+	do {
+		if (!is_iter_next_valid) {
+			return "iter_next: not valid";
+		}
+
+		Variant value = p_input.iter_get(iter, is_iter_get_valid);
+		if (!is_iter_get_valid) {
+			return "iter_get: not valid";
+		}
+		output.push_back(((int)value) + 5);
+
+	} while (p_input.iter_next(iter, is_iter_next_valid));
+
+	if (!is_iter_next_valid) {
+		return "iter_next: not valid";
+	}
+
+	return output;
+}
+
+void Example::test_rpc(int p_value) {
+	last_rpc_arg = p_value;
+}
+
+void Example::test_send_rpc(int p_value) {
+	rpc("test_rpc", p_value);
+}
+
+int Example::return_last_rpc_arg() {
+	return last_rpc_arg;
+}
+
+void Example::callable_bind() {
+	Callable c = Callable(this, "emit_custom_signal").bind("bound", 11);
+	c.call();
+}
+
 // Properties.
 void Example::set_custom_position(const Vector2 &pos) {
 	custom_position = pos;
@@ -328,6 +606,12 @@ Vector4 Example::get_v4() const {
 	return Vector4(1.2, 3.4, 5.6, 7.8);
 }
 
+bool Example::test_post_initialize() const {
+	Ref<ExampleRef> new_example_ref;
+	new_example_ref.instantiate();
+	return new_example_ref->was_post_initialized();
+}
+
 // Virtual function override.
 bool Example::_has_point(const Vector2 &point) const {
 	Label *label = get_node<Label>("Label");
@@ -335,3 +619,10 @@ bool Example::_has_point(const Vector2 &point) const {
 
 	return false;
 }
+
+void Example::_input(const Ref<InputEvent> &event) {
+	const InputEventKey *key_event = Object::cast_to<const InputEventKey>(*event);
+	if (key_event) {
+		emit_custom_signal(String("_input: ") + key_event->get_key_label(), key_event->get_unicode());
+	}
+}

test/src/example.h

@@ -16,7 +16,12 @@
 
 #include <godot_cpp/classes/control.hpp>
 #include <godot_cpp/classes/global_constants.hpp>
+#include <godot_cpp/classes/image.hpp>
+#include <godot_cpp/classes/input_event_key.hpp>
+#include <godot_cpp/classes/tile_map.hpp>
+#include <godot_cpp/classes/tile_set.hpp>
 #include <godot_cpp/classes/viewport.hpp>
+#include <godot_cpp/variant/variant.hpp>
 
 #include <godot_cpp/core/binder_common.hpp>
 
@@ -30,15 +35,21 @@ private:
 	static int last_id;
 
 	int id;
+	bool post_initialized = false;
 
 protected:
 	static void _bind_methods();
 
+	void _notification(int p_what);
+
 public:
 	ExampleRef();
 	~ExampleRef();
 
+	void set_id(int p_id);
 	int get_id() const;
+
+	bool was_post_initialized() const { return post_initialized; }
 };
 
 class ExampleMin : public Control {
@@ -60,6 +71,7 @@ protected:
 	void _get_property_list(List<PropertyInfo> *p_list) const;
 	bool _property_can_revert(const StringName &p_name) const;
 	bool _property_get_revert(const StringName &p_name, Variant &r_property) const;
+	void _validate_property(PropertyInfo &p_property) const;
 
 	String _to_string() const;
 
@@ -67,6 +79,7 @@ private:
 	Vector2 custom_position;
 	Vector3 property_from_list;
 	Vector2 dprop[3];
+	int last_rpc_arg = 0;
 
 public:
 	// Constants.
@@ -90,8 +103,13 @@ public:
 	// Functions.
 	void simple_func();
 	void simple_const_func() const;
+	int custom_ref_func(Ref<ExampleRef> p_ref);
+	int custom_const_ref_func(const Ref<ExampleRef> &p_ref);
+	String image_ref_func(Ref<Image> p_image);
+	String image_const_ref_func(const Ref<Image> &p_image);
 	String return_something(const String &base);
 	Viewport *return_something_const() const;
+	Ref<ExampleRef> return_ref() const;
 	Ref<ExampleRef> return_empty_ref() const;
 	ExampleRef *return_extended_ref() const;
 	Ref<ExampleRef> extended_ref_checks(Ref<ExampleRef> p_ref) const;
@@ -102,26 +120,67 @@ public:
 	int def_args(int p_a = 100, int p_b = 200);
 
 	Array test_array() const;
-	void test_tarray_arg(const TypedArray<int64_t> &p_array);
+	int test_tarray_arg(const TypedArray<int64_t> &p_array);
 	TypedArray<Vector2> test_tarray() const;
 	Dictionary test_dictionary() const;
 	Example *test_node_argument(Example *p_node) const;
 	String test_string_ops() const;
+	String test_str_utility() const;
+	bool test_string_is_fourty_two(const String &p_str) const;
+	String test_string_resize(String p_original) const;
 	int test_vector_ops() const;
 
+	bool test_object_cast_to_node(Object *p_object) const;
+	bool test_object_cast_to_control(Object *p_object) const;
+	bool test_object_cast_to_example(Object *p_object) const;
+
+	Vector2i test_variant_vector2i_conversion(const Variant &p_variant) const;
+	int test_variant_int_conversion(const Variant &p_variant) const;
+	float test_variant_float_conversion(const Variant &p_variant) const;
+
+	void test_add_child(Node *p_node);
+	void test_set_tileset(TileMap *p_tilemap, const Ref<TileSet> &p_tileset) const;
+
+	Variant test_variant_call(Variant p_variant);
+
+	Callable test_callable_mp();
+	Callable test_callable_mp_ret();
+	Callable test_callable_mp_retc() const;
+	Callable test_callable_mp_static() const;
+	Callable test_callable_mp_static_ret() const;
+	Callable test_custom_callable() const;
+
+	void unbound_method1(Object *p_object, String p_string, int p_int);
+	String unbound_method2(Object *p_object, String p_string, int p_int);
+	String unbound_method3(Object *p_object, String p_string, int p_int) const;
+	static void unbound_static_method1(Example *p_object, String p_string, int p_int);
+	static String unbound_static_method2(Object *p_object, String p_string, int p_int);
+
 	BitField<Flags> test_bitfield(BitField<Flags> flags);
 
+	Variant test_variant_iterator(const Variant &p_input);
+
+	// RPC
+	void test_rpc(int p_value);
+	void test_send_rpc(int p_value);
+	int return_last_rpc_arg();
+
+	void callable_bind();
+
 	// Property.
 	void set_custom_position(const Vector2 &pos);
 	Vector2 get_custom_position() const;
 	Vector4 get_v4() const;
 
+	bool test_post_initialize() const;
+
 	// Static method.
 	static int test_static(int p_a, int p_b);
 	static void test_static2();
 
 	// Virtual function override (no need to bind manually).
 	virtual bool _has_point(const Vector2 &point) const override;
+	virtual void _input(const Ref<InputEvent> &event) override;
 };
 
 VARIANT_ENUM_CAST(Example::Constants);

test/src/register_types.cpp

@@ -36,8 +36,8 @@ void uninitialize_example_module(ModuleInitializationLevel p_level) {
 
 extern "C" {
 // Initialization.
-GDExtensionBool GDE_EXPORT example_library_init(const GDExtensionInterface *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
-	godot::GDExtensionBinding::InitObject init_obj(p_interface, p_library, r_initialization);
+GDExtensionBool GDE_EXPORT example_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
+	godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization);
 
 	init_obj.register_initializer(initialize_example_module);
 	init_obj.register_terminator(uninitialize_example_module);

tools/android.py

@@ -8,41 +8,51 @@ def options(opts):
     opts.Add(
         "android_api_level",
         "Target Android API level",
-        "18" if "32" in ARGUMENTS.get("arch", "arm64") else "21",
+        "21",
     )
     opts.Add(
-        "ANDROID_NDK_ROOT",
-        "Path to your Android NDK installation. By default, uses ANDROID_NDK_ROOT from your defined environment variables.",
-        os.environ.get("ANDROID_NDK_ROOT", None),
+        "ANDROID_HOME",
+        "Path to your Android SDK installation. By default, uses ANDROID_HOME from your defined environment variables.",
+        os.environ.get("ANDROID_HOME", os.environ.get("ANDROID_SDK_ROOT")),
     )
 
 
 def exists(env):
-    return "ANDROID_NDK_ROOT" in os.environ or "ANDROID_NDK_ROOT" in ARGUMENTS
+    return get_android_ndk_root(env) is not None
+
+
+# This must be kept in sync with the value in https://github.com/godotengine/godot/blob/master/platform/android/detect.py#L58.
+def get_ndk_version():
+    return "23.2.8568313"
+
+
+def get_android_ndk_root(env):
+    if env["ANDROID_HOME"]:
+        return env["ANDROID_HOME"] + "/ndk/" + get_ndk_version()
+    else:
+        return os.environ.get("ANDROID_NDK_ROOT")
 
 
 def generate(env):
-    if "ANDROID_NDK_ROOT" not in env:
+    if get_android_ndk_root(env) is None:
         raise ValueError(
-            "To build for Android, ANDROID_NDK_ROOT must be defined. Please set ANDROID_NDK_ROOT to the root folder of your Android NDK installation."
+            "To build for Android, the path to the NDK must be defined. Please set ANDROID_HOME to the root folder of your Android SDK installation."
         )
 
     if env["arch"] not in ("arm64", "x86_64", "arm32", "x86_32"):
         print("Only arm64, x86_64, arm32, and x86_32 are supported on Android. Exiting.")
-        Exit()
+        env.Exit(1)
 
     if sys.platform == "win32" or sys.platform == "msys":
         my_spawn.configure(env)
 
     # Validate API level
-    api_level = int(env["android_api_level"])
-    if "64" in env["arch"] and api_level < 21:
-        print("WARN: 64-bit Android architectures require an API level of at least 21; setting android_api_level=21")
+    if int(env["android_api_level"]) < 21:
+        print("WARNING: minimum supported Android target api is 21. Forcing target api 21.")
         env["android_api_level"] = "21"
-        api_level = 21
 
     # Setup toolchain
-    toolchain = env["ANDROID_NDK_ROOT"] + "/toolchains/llvm/prebuilt/"
+    toolchain = get_android_ndk_root(env) + "/toolchains/llvm/prebuilt/"
     if sys.platform == "win32" or sys.platform == "msys":
         toolchain += "windows"
         import platform as pltfm
@@ -100,3 +110,5 @@ def generate(env):
     )
     env.Append(CCFLAGS=arch_info["ccflags"])
     env.Append(LINKFLAGS=["--target=" + arch_info["target"] + env["android_api_level"], "-march=" + arch_info["march"]])
+
+    env.Append(CPPDEFINES=["ANDROID_ENABLED", "UNIX_ENABLED"])

tools/godotcpp.py

@@ -0,0 +1,361 @@
+import os, sys, platform
+
+from SCons.Variables import EnumVariable, PathVariable, BoolVariable
+from SCons.Tool import Tool
+from SCons.Builder import Builder
+from SCons.Errors import UserError
+
+from binding_generator import scons_generate_bindings, scons_emit_files
+
+
+def add_sources(sources, dir, extension):
+    for f in os.listdir(dir):
+        if f.endswith("." + extension):
+            sources.append(dir + "/" + f)
+
+
+def normalize_path(val, env):
+    return val if os.path.isabs(val) else os.path.join(env.Dir("#").abspath, val)
+
+
+def validate_file(key, val, env):
+    if not os.path.isfile(normalize_path(val, env)):
+        raise UserError("'%s' is not a file: %s" % (key, val))
+
+
+def validate_dir(key, val, env):
+    if not os.path.isdir(normalize_path(val, env)):
+        raise UserError("'%s' is not a directory: %s" % (key, val))
+
+
+def validate_parent_dir(key, val, env):
+    if not os.path.isdir(normalize_path(os.path.dirname(val), env)):
+        raise UserError("'%s' is not a directory: %s" % (key, os.path.dirname(val)))
+
+
+platforms = ("linux", "macos", "windows", "android", "ios", "web")
+
+# CPU architecture options.
+architecture_array = [
+    "",
+    "universal",
+    "x86_32",
+    "x86_64",
+    "arm32",
+    "arm64",
+    "rv64",
+    "ppc32",
+    "ppc64",
+    "wasm32",
+]
+architecture_aliases = {
+    "x64": "x86_64",
+    "amd64": "x86_64",
+    "armv7": "arm32",
+    "armv8": "arm64",
+    "arm64v8": "arm64",
+    "aarch64": "arm64",
+    "rv": "rv64",
+    "riscv": "rv64",
+    "riscv64": "rv64",
+    "ppcle": "ppc32",
+    "ppc": "ppc32",
+    "ppc64le": "ppc64",
+}
+
+
+def exists(env):
+    return True
+
+
+def options(opts, env):
+    # Try to detect the host platform automatically.
+    # This is used if no `platform` argument is passed
+    if sys.platform.startswith("linux"):
+        default_platform = "linux"
+    elif sys.platform == "darwin":
+        default_platform = "macos"
+    elif sys.platform == "win32" or sys.platform == "msys":
+        default_platform = "windows"
+    elif ARGUMENTS.get("platform", ""):
+        default_platform = ARGUMENTS.get("platform")
+    else:
+        raise ValueError("Could not detect platform automatically, please specify with platform=<platform>")
+
+    opts.Add(
+        EnumVariable(
+            key="platform",
+            help="Target platform",
+            default=env.get("platform", default_platform),
+            allowed_values=platforms,
+            ignorecase=2,
+        )
+    )
+
+    # Editor and template_debug are compatible (i.e. you can use the same binary for Godot editor builds and Godot debug templates).
+    # Godot release templates are only compatible with "template_release" builds.
+    # For this reason, we default to template_debug builds, unlike Godot which defaults to editor builds.
+    opts.Add(
+        EnumVariable(
+            key="target",
+            help="Compilation target",
+            default=env.get("target", "template_debug"),
+            allowed_values=("editor", "template_release", "template_debug"),
+        )
+    )
+    opts.Add(
+        PathVariable(
+            key="gdextension_dir",
+            help="Path to a custom directory containing GDExtension interface header and API JSON file",
+            default=env.get("gdextension_dir", None),
+            validator=validate_dir,
+        )
+    )
+    opts.Add(
+        PathVariable(
+            key="custom_api_file",
+            help="Path to a custom GDExtension API JSON file (takes precedence over `gdextension_dir`)",
+            default=env.get("custom_api_file", None),
+            validator=validate_file,
+        )
+    )
+    opts.Add(
+        BoolVariable(
+            key="generate_bindings",
+            help="Force GDExtension API bindings generation. Auto-detected by default.",
+            default=env.get("generate_bindings", False),
+        )
+    )
+    opts.Add(
+        BoolVariable(
+            key="generate_template_get_node",
+            help="Generate a template version of the Node class's get_node.",
+            default=env.get("generate_template_get_node", True),
+        )
+    )
+    opts.Add(
+        BoolVariable(
+            key="build_library",
+            help="Build the godot-cpp library.",
+            default=env.get("build_library", True),
+        )
+    )
+    opts.Add(
+        EnumVariable(
+            key="precision",
+            help="Set the floating-point precision level",
+            default=env.get("precision", "single"),
+            allowed_values=("single", "double"),
+        )
+    )
+    opts.Add(
+        EnumVariable(
+            key="arch",
+            help="CPU architecture",
+            default=env.get("arch", ""),
+            allowed_values=architecture_array,
+            map=architecture_aliases,
+        )
+    )
+
+    # compiledb
+    opts.Add(
+        BoolVariable(
+            key="compiledb",
+            help="Generate compilation DB (`compile_commands.json`) for external tools",
+            default=env.get("compiledb", False),
+        )
+    )
+    opts.Add(
+        PathVariable(
+            key="compiledb_file",
+            help="Path to a custom `compile_commands.json` file",
+            default=env.get("compiledb_file", "compile_commands.json"),
+            validator=validate_parent_dir,
+        )
+    )
+
+    opts.Add(
+        BoolVariable(
+            key="use_hot_reload",
+            help="Enable the extra accounting required to support hot reload.",
+            default=env.get("use_hot_reload", None),
+        )
+    )
+
+    opts.Add(
+        BoolVariable(
+            "disable_exceptions", "Force disabling exception handling code", default=env.get("disable_exceptions", True)
+        )
+    )
+
+    opts.Add(
+        EnumVariable(
+            key="symbols_visibility",
+            help="Symbols visibility on GNU platforms. Use 'auto' to apply the default value.",
+            default=env.get("symbols_visibility", "hidden"),
+            allowed_values=["auto", "visible", "hidden"],
+        )
+    )
+
+    # Add platform options
+    for pl in platforms:
+        tool = Tool(pl, toolpath=["tools"])
+        if hasattr(tool, "options"):
+            tool.options(opts)
+
+    # Targets flags tool (optimizations, debug symbols)
+    target_tool = Tool("targets", toolpath=["tools"])
+    target_tool.options(opts)
+
+
+def generate(env):
+    # Default num_jobs to local cpu count if not user specified.
+    # SCons has a peculiarity where user-specified options won't be overridden
+    # by SetOption, so we can rely on this to know if we should use our default.
+    initial_num_jobs = env.GetOption("num_jobs")
+    altered_num_jobs = initial_num_jobs + 1
+    env.SetOption("num_jobs", altered_num_jobs)
+    if env.GetOption("num_jobs") == altered_num_jobs:
+        cpu_count = os.cpu_count()
+        if cpu_count is None:
+            print("Couldn't auto-detect CPU count to configure build parallelism. Specify it with the -j argument.")
+        else:
+            safer_cpu_count = cpu_count if cpu_count <= 4 else cpu_count - 1
+            print(
+                "Auto-detected %d CPU cores available for build parallelism. Using %d cores by default. You can override it with the -j argument."
+                % (cpu_count, safer_cpu_count)
+            )
+            env.SetOption("num_jobs", safer_cpu_count)
+
+    # Process CPU architecture argument.
+    if env["arch"] == "":
+        # No architecture specified. Default to arm64 if building for Android,
+        # universal if building for macOS or iOS, wasm32 if building for web,
+        # otherwise default to the host architecture.
+        if env["platform"] in ["macos", "ios"]:
+            env["arch"] = "universal"
+        elif env["platform"] == "android":
+            env["arch"] = "arm64"
+        elif env["platform"] == "web":
+            env["arch"] = "wasm32"
+        else:
+            host_machine = platform.machine().lower()
+            if host_machine in architecture_array:
+                env["arch"] = host_machine
+            elif host_machine in architecture_aliases.keys():
+                env["arch"] = architecture_aliases[host_machine]
+            elif "86" in host_machine:
+                # Catches x86, i386, i486, i586, i686, etc.
+                env["arch"] = "x86_32"
+            else:
+                print("Unsupported CPU architecture: " + host_machine)
+                env.Exit(1)
+
+    print("Building for architecture " + env["arch"] + " on platform " + env["platform"])
+
+    if env.get("use_hot_reload") is None:
+        env["use_hot_reload"] = env["target"] != "template_release"
+    if env["use_hot_reload"]:
+        env.Append(CPPDEFINES=["HOT_RELOAD_ENABLED"])
+
+    tool = Tool(env["platform"], toolpath=["tools"])
+
+    if tool is None or not tool.exists(env):
+        raise ValueError("Required toolchain not found for platform " + env["platform"])
+
+    tool.generate(env)
+    target_tool = Tool("targets", toolpath=["tools"])
+    target_tool.generate(env)
+
+    # Disable exception handling. Godot doesn't use exceptions anywhere, and this
+    # saves around 20% of binary size and very significant build time.
+    if env["disable_exceptions"]:
+        if env.get("is_msvc", False):
+            env.Append(CPPDEFINES=[("_HAS_EXCEPTIONS", 0)])
+        else:
+            env.Append(CXXFLAGS=["-fno-exceptions"])
+    elif env.get("is_msvc", False):
+        env.Append(CXXFLAGS=["/EHsc"])
+
+    if not env.get("is_msvc", False):
+        if env["symbols_visibility"] == "visible":
+            env.Append(CCFLAGS=["-fvisibility=default"])
+            env.Append(LINKFLAGS=["-fvisibility=default"])
+        elif env["symbols_visibility"] == "hidden":
+            env.Append(CCFLAGS=["-fvisibility=hidden"])
+            env.Append(LINKFLAGS=["-fvisibility=hidden"])
+
+    # Require C++17
+    if env.get("is_msvc", False):
+        env.Append(CXXFLAGS=["/std:c++17"])
+    else:
+        env.Append(CXXFLAGS=["-std=c++17"])
+
+    if env["precision"] == "double":
+        env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"])
+
+    # Suffix
+    suffix = ".{}.{}".format(env["platform"], env["target"])
+    if env.dev_build:
+        suffix += ".dev"
+    if env["precision"] == "double":
+        suffix += ".double"
+    suffix += "." + env["arch"]
+    if env["ios_simulator"]:
+        suffix += ".simulator"
+
+    env["suffix"] = suffix  # Exposed when included from another project
+    env["OBJSUFFIX"] = suffix + env["OBJSUFFIX"]
+
+    # compile_commands.json
+    env.Tool("compilation_db")
+    env.Alias("compiledb", env.CompilationDatabase(normalize_path(env["compiledb_file"], env)))
+
+    # Builders
+    env.Append(BUILDERS={"GodotCPPBindings": Builder(action=scons_generate_bindings, emitter=scons_emit_files)})
+    env.AddMethod(_godot_cpp, "GodotCPP")
+
+
+def _godot_cpp(env):
+    extension_dir = normalize_path(env.get("gdextension_dir", env.Dir("gdextension").abspath), env)
+    api_file = normalize_path(env.get("custom_api_file", env.File(extension_dir + "/extension_api.json").abspath), env)
+    bindings = env.GodotCPPBindings(
+        env.Dir("."),
+        [
+            api_file,
+            os.path.join(extension_dir, "gdextension_interface.h"),
+            "binding_generator.py",
+        ],
+    )
+    # Forces bindings regeneration.
+    if env["generate_bindings"]:
+        env.AlwaysBuild(bindings)
+        env.NoCache(bindings)
+
+    # Sources to compile
+    sources = []
+    add_sources(sources, "src", "cpp")
+    add_sources(sources, "src/classes", "cpp")
+    add_sources(sources, "src/core", "cpp")
+    add_sources(sources, "src/variant", "cpp")
+    sources.extend([f for f in bindings if str(f).endswith(".cpp")])
+
+    # Includes
+    env.AppendUnique(CPPPATH=[env.Dir(d) for d in [extension_dir, "include", "gen/include"]])
+
+    library = None
+    library_name = "libgodot-cpp" + env["suffix"] + env["LIBSUFFIX"]
+
+    if env["build_library"]:
+        library = env.StaticLibrary(target=env.File("bin/%s" % library_name), source=sources)
+        default_args = [library]
+
+        # Add compiledb if the option is set
+        if env.get("compiledb", False):
+            default_args += ["compiledb"]
+
+        env.Default(*default_args)
+
+    env.AppendUnique(LIBS=[env.File("bin/%s" % library_name)])
+    return library

tools/ios.py

@@ -1,7 +1,6 @@
 import os
 import sys
 import subprocess
-import ios_osxcross
 from SCons.Variables import *
 
 if sys.version_info < (3,):
@@ -16,26 +15,31 @@ else:
         return codecs.utf_8_decode(x)[0]
 
 
+def has_ios_osxcross():
+    return "OSXCROSS_IOS" in os.environ
+
+
 def options(opts):
     opts.Add(BoolVariable("ios_simulator", "Target iOS Simulator", False))
-    opts.Add("ios_min_version", "Target minimum iphoneos/iphonesimulator version", "10.0")
+    opts.Add("ios_min_version", "Target minimum iphoneos/iphonesimulator version", "12.0")
     opts.Add(
         "IOS_TOOLCHAIN_PATH",
         "Path to iOS toolchain",
         "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain",
     )
     opts.Add("IOS_SDK_PATH", "Path to the iOS SDK", "")
-    ios_osxcross.options(opts)
+
+    if has_ios_osxcross():
+        opts.Add("ios_triple", "Triple for ios toolchain", "")
 
 
 def exists(env):
-    return sys.platform == "darwin" or ios_osxcross.exists(env)
+    return sys.platform == "darwin" or has_ios_osxcross()
 
 
 def generate(env):
     if env["arch"] not in ("universal", "arm64", "x86_64"):
-        print("Only universal, arm64, and x86_64 are supported on iOS. Exiting.")
-        Exit()
+        raise ValueError("Only universal, arm64, and x86_64 are supported on iOS. Exiting.")
 
     if env["ios_simulator"]:
         sdk_name = "iphonesimulator"
@@ -64,7 +68,26 @@ def generate(env):
         env["ENV"]["PATH"] = env["IOS_TOOLCHAIN_PATH"] + "/Developer/usr/bin/:" + env["ENV"]["PATH"]
 
     else:
-        ios_osxcross.generate(env)
+        # OSXCross
+        compiler_path = "$IOS_TOOLCHAIN_PATH/usr/bin/${ios_triple}"
+        env["CC"] = compiler_path + "clang"
+        env["CXX"] = compiler_path + "clang++"
+        env["AR"] = compiler_path + "ar"
+        env["RANLIB"] = compiler_path + "ranlib"
+        env["SHLIBSUFFIX"] = ".dylib"
+
+        env.Prepend(
+            CPPPATH=[
+                "$IOS_SDK_PATH/usr/include",
+                "$IOS_SDK_PATH/System/Library/Frameworks/AudioUnit.framework/Headers",
+            ]
+        )
+
+        env.Append(CCFLAGS=["-stdlib=libc++"])
+
+        binpath = os.path.join(env["IOS_TOOLCHAIN_PATH"], "usr", "bin")
+        if binpath not in env["ENV"]["PATH"]:
+            env.PrependENVPath("PATH", binpath)
 
     if env["arch"] == "universal":
         if env["ios_simulator"]:
@@ -79,3 +102,5 @@ def generate(env):
 
     env.Append(CCFLAGS=["-isysroot", env["IOS_SDK_PATH"]])
     env.Append(LINKFLAGS=["-isysroot", env["IOS_SDK_PATH"], "-F" + env["IOS_SDK_PATH"]])
+
+    env.Append(CPPDEFINES=["IOS_ENABLED", "UNIX_ENABLED"])

tools/ios_osxcross.py

@@ -1,26 +0,0 @@
-import os
-
-
-def options(opts):
-    opts.Add("ios_triple", "Triple for ios toolchain", "")
-
-
-def exists(env):
-    return "OSXCROSS_IOS" in os.environ
-
-
-def generate(env):
-    compiler_path = "$IOS_TOOLCHAIN_PATH/usr/bin/${ios_triple}"
-    env["CC"] = compiler_path + "clang"
-    env["CXX"] = compiler_path + "clang++"
-    env["AR"] = compiler_path + "ar"
-    env["RANLIB"] = compiler_path + "ranlib"
-    env["SHLIBSUFFIX"] = ".dylib"
-
-    env.Prepend(
-        CPPPATH=[
-            "$IOS_SDK_PATH/usr/include",
-            "$IOS_SDK_PATH/System/Library/Frameworks/AudioUnit.framework/Headers",
-        ]
-    )
-    env.Append(CCFLAGS=["-stdlib=libc++"])

tools/linux.py

@@ -14,6 +14,9 @@ def generate(env):
     if env["use_llvm"]:
         clang.generate(env)
         clangxx.generate(env)
+    elif env["use_hot_reload"]:
+        # Required for extensions to truly unload.
+        env.Append(CXXFLAGS=["-fno-gnu-unique"])
 
     env.Append(CCFLAGS=["-fPIC", "-Wwrite-strings"])
     env.Append(LINKFLAGS=["-Wl,-R,'$$ORIGIN'"])
@@ -32,3 +35,5 @@ def generate(env):
     elif env["arch"] == "rv64":
         env.Append(CCFLAGS=["-march=rv64gc"])
         env.Append(LINKFLAGS=["-march=rv64gc"])
+
+    env.Append(CPPDEFINES=["LINUX_ENABLED", "UNIX_ENABLED"])

tools/macos.py

@@ -1,31 +1,51 @@
 import os
 import sys
-import macos_osxcross
+
+
+def has_osxcross():
+    return "OSXCROSS_ROOT" in os.environ
 
 
 def options(opts):
     opts.Add("macos_deployment_target", "macOS deployment target", "default")
     opts.Add("macos_sdk_path", "macOS SDK path", "")
-    macos_osxcross.options(opts)
+    if has_osxcross():
+        opts.Add("osxcross_sdk", "OSXCross SDK version", "darwin16")
 
 
 def exists(env):
-    return sys.platform == "darwin" or macos_osxcross.exists(env)
+    return sys.platform == "darwin" or has_osxcross()
 
 
 def generate(env):
     if env["arch"] not in ("universal", "arm64", "x86_64"):
         print("Only universal, arm64, and x86_64 are supported on macOS. Exiting.")
-        Exit()
+        env.Exit(1)
 
     if sys.platform == "darwin":
         # Use clang on macOS by default
         env["CXX"] = "clang++"
         env["CC"] = "clang"
     else:
-        # Use osxcross
-        macos_osxcross.generate(env)
+        # OSXCross
+        root = os.environ.get("OSXCROSS_ROOT", "")
+        if env["arch"] == "arm64":
+            basecmd = root + "/target/bin/arm64-apple-" + env["osxcross_sdk"] + "-"
+        else:
+            basecmd = root + "/target/bin/x86_64-apple-" + env["osxcross_sdk"] + "-"
 
+        env["CC"] = basecmd + "clang"
+        env["CXX"] = basecmd + "clang++"
+        env["AR"] = basecmd + "ar"
+        env["RANLIB"] = basecmd + "ranlib"
+        env["AS"] = basecmd + "as"
+
+        binpath = os.path.join(root, "target", "bin")
+        if binpath not in env["ENV"]["PATH"]:
+            # Add OSXCROSS bin folder to PATH (required for linking).
+            env.PrependENVPath("PATH", binpath)
+
+    # Common flags
     if env["arch"] == "universal":
         env.Append(LINKFLAGS=["-arch", "x86_64", "-arch", "arm64"])
         env.Append(CCFLAGS=["-arch", "x86_64", "-arch", "arm64"])
@@ -48,3 +68,5 @@ def generate(env):
             "-Wl,-undefined,dynamic_lookup",
         ]
     )
+
+    env.Append(CPPDEFINES=["MACOS_ENABLED", "UNIX_ENABLED"])

tools/macos_osxcross.py

@@ -1,28 +0,0 @@
-import os
-
-
-def options(opts):
-    opts.Add("osxcross_sdk", "OSXCross SDK version", "darwin16")
-
-
-def exists(env):
-    return "OSXCROSS_ROOT" in os.environ
-
-
-def generate(env):
-    root = os.environ.get("OSXCROSS_ROOT", "")
-    if env["arch"] == "arm64":
-        basecmd = root + "/target/bin/arm64-apple-" + env["osxcross_sdk"] + "-"
-    else:
-        basecmd = root + "/target/bin/x86_64-apple-" + env["osxcross_sdk"] + "-"
-
-    env["CC"] = basecmd + "clang"
-    env["CXX"] = basecmd + "clang++"
-    env["AR"] = basecmd + "ar"
-    env["RANLIB"] = basecmd + "ranlib"
-    env["AS"] = basecmd + "as"
-
-    binpath = os.path.join(root, "target", "bin")
-    if binpath not in env["ENV"]["PATH"]:
-        # Add OSXCROSS bin folder to PATH (required for linking).
-        env["ENV"]["PATH"] = "%s:%s" % (binpath, env["ENV"]["PATH"])

tools/targets.py

@@ -1,10 +1,14 @@
 import os
+import subprocess
 import sys
 from SCons.Script import ARGUMENTS
 from SCons.Variables import *
 from SCons.Variables.BoolVariable import _text2bool
 
 
+# Helper methods
+
+
 def get_cmdline_bool(option, default):
     """We use `ARGUMENTS.get()` to check if options were manually overridden on the command line,
     and SCons' _text2bool helper to convert them to booleans, otherwise they're handled as strings.
@@ -16,6 +20,24 @@ def get_cmdline_bool(option, default):
         return default
 
 
+def using_clang(env):
+    return "clang" in os.path.basename(env["CC"])
+
+
+def is_vanilla_clang(env):
+    if not using_clang(env):
+        return False
+    try:
+        version = subprocess.check_output([env.subst(env["CXX"]), "--version"]).strip().decode("utf-8")
+    except (subprocess.CalledProcessError, OSError):
+        print("Couldn't parse CXX environment variable to infer compiler version.")
+        return False
+    return not version.startswith("Apple")
+
+
+# Main tool definition
+
+
 def options(opts):
     opts.Add(
         EnumVariable(
@@ -34,19 +56,21 @@ def exists(env):
 
 
 def generate(env):
+    # Configuration of build targets:
+    # - Editor or template
+    # - Debug features (DEBUG_ENABLED code)
+    # - Dev only code (DEV_ENABLED code)
+    # - Optimization level
+    # - Debug symbols for crash traces / debuggers
+
+    # Keep this configuration in sync with SConstruct in upstream Godot.
+
+    env.editor_build = env["target"] == "editor"
     env.dev_build = env["dev_build"]
     env.debug_features = env["target"] in ["editor", "template_debug"]
-    env.editor_build = env["target"] == "editor"
-
-    if env.editor_build:
-        env.AppendUnique(CPPDEFINES=["TOOLS_ENABLED"])
-
-    if env.debug_features:
-        env.AppendUnique(CPPDEFINES=["DEBUG_ENABLED", "DEBUG_METHODS_ENABLED"])
 
     if env.dev_build:
         opt_level = "none"
-        env.AppendUnique(CPPDEFINES=["DEV_ENABLED"])
     elif env.debug_features:
         opt_level = "speed_trace"
     else:  # Release
@@ -55,29 +79,57 @@ def generate(env):
     env["optimize"] = ARGUMENTS.get("optimize", opt_level)
     env["debug_symbols"] = get_cmdline_bool("debug_symbols", env.dev_build)
 
+    if env.editor_build:
+        env.Append(CPPDEFINES=["TOOLS_ENABLED"])
+
+    if env.debug_features:
+        # DEBUG_ENABLED enables debugging *features* and debug-only code, which is intended
+        # to give *users* extra debugging information for their game development.
+        env.Append(CPPDEFINES=["DEBUG_ENABLED"])
+        # In upstream Godot this is added in typedefs.h when DEBUG_ENABLED is set.
+        env.Append(CPPDEFINES=["DEBUG_METHODS_ENABLED"])
+
+    if env.dev_build:
+        # DEV_ENABLED enables *engine developer* code which should only be compiled for those
+        # working on the engine itself.
+        env.Append(CPPDEFINES=["DEV_ENABLED"])
+    else:
+        # Disable assert() for production targets (only used in thirdparty code).
+        env.Append(CPPDEFINES=["NDEBUG"])
+
+    # Set optimize and debug_symbols flags.
+    # "custom" means do nothing and let users set their own optimization flags.
     if env.get("is_msvc", False):
         if env["debug_symbols"]:
             env.Append(CCFLAGS=["/Zi", "/FS"])
             env.Append(LINKFLAGS=["/DEBUG:FULL"])
 
-        if env["optimize"] == "speed" or env["optimize"] == "speed_trace":
+        if env["optimize"] == "speed":
             env.Append(CCFLAGS=["/O2"])
             env.Append(LINKFLAGS=["/OPT:REF"])
+        elif env["optimize"] == "speed_trace":
+            env.Append(CCFLAGS=["/O2"])
+            env.Append(LINKFLAGS=["/OPT:REF", "/OPT:NOICF"])
         elif env["optimize"] == "size":
             env.Append(CCFLAGS=["/O1"])
             env.Append(LINKFLAGS=["/OPT:REF"])
-
-        if env["optimize"] == "debug" or env["optimize"] == "none":
-            env.Append(CCFLAGS=["/MDd", "/Od"])
-        else:
-            env.Append(CCFLAGS=["/MD"])
-
+        elif env["optimize"] == "debug" or env["optimize"] == "none":
+            env.Append(CCFLAGS=["/Od"])
     else:
         if env["debug_symbols"]:
+            # Adding dwarf-4 explicitly makes stacktraces work with clang builds,
+            # otherwise addr2line doesn't understand them.
+            env.Append(CCFLAGS=["-gdwarf-4"])
             if env.dev_build:
                 env.Append(CCFLAGS=["-g3"])
             else:
                 env.Append(CCFLAGS=["-g2"])
+        else:
+            if using_clang(env) and not is_vanilla_clang(env):
+                # Apple Clang, its linker doesn't like -s.
+                env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
+            else:
+                env.Append(LINKFLAGS=["-s"])
 
         if env["optimize"] == "speed":
             env.Append(CCFLAGS=["-O3"])

tools/web.py

@@ -1,45 +1,44 @@
 import os
+from SCons.Util import WhereIs
 
 
 def exists(env):
-    return "EM_CONFIG" in os.environ
+    return WhereIs("emcc") is not None
 
 
 def generate(env):
     if env["arch"] not in ("wasm32"):
         print("Only wasm32 supported on web. Exiting.")
-        Exit()
-
-    if "EM_CONFIG" in os.environ:
-        env["ENV"] = os.environ
+        env.Exit(1)
 
+    # Emscripten toolchain
     env["CC"] = "emcc"
     env["CXX"] = "em++"
     env["AR"] = "emar"
     env["RANLIB"] = "emranlib"
-    env.Append(CPPFLAGS=["-s", "SIDE_MODULE=1"])
-    env.Append(LINKFLAGS=["-s", "SIDE_MODULE=1"])
-    env["SHOBJSUFFIX"] = ".bc"
-    env["SHLIBSUFFIX"] = ".wasm"
+
     # Use TempFileMunge since some AR invocations are too long for cmd.exe.
     # Use POSIX-style paths, required with TempFileMunge.
     env["ARCOM_POSIX"] = env["ARCOM"].replace("$TARGET", "$TARGET.posix").replace("$SOURCES", "$SOURCES.posix")
     env["ARCOM"] = "${TEMPFILE(ARCOM_POSIX)}"
 
-    # All intermediate files are just LLVM bitcode.
-    env["OBJPREFIX"] = ""
-    env["OBJSUFFIX"] = ".bc"
-    env["PROGPREFIX"] = ""
-    # Program() output consists of multiple files, so specify suffixes manually at builder.
-    env["PROGSUFFIX"] = ""
+    # All intermediate files are just object files.
+    env["OBJSUFFIX"] = ".o"
+    env["SHOBJSUFFIX"] = ".o"
+
+    # Static libraries clang-style.
     env["LIBPREFIX"] = "lib"
     env["LIBSUFFIX"] = ".a"
-    env["LIBPREFIXES"] = ["$LIBPREFIX"]
-    env["LIBSUFFIXES"] = ["$LIBSUFFIX"]
-    env.Replace(SHLINKFLAGS="$LINKFLAGS")
-    env.Replace(SHLINKFLAGS="$LINKFLAGS")
 
-    if env["target"] == "debug":
-        env.Append(CCFLAGS=["-O0", "-g"])
-    elif env["target"] == "release":
-        env.Append(CCFLAGS=["-O3"])
+    # Shared library as wasm.
+    env["SHLIBSUFFIX"] = ".wasm"
+
+    # Thread support (via SharedArrayBuffer).
+    env.Append(CCFLAGS=["-s", "USE_PTHREADS=1"])
+    env.Append(LINKFLAGS=["-s", "USE_PTHREADS=1"])
+
+    # Build as side module (shared library).
+    env.Append(CPPFLAGS=["-s", "SIDE_MODULE=1"])
+    env.Append(LINKFLAGS=["-s", "SIDE_MODULE=1"])
+
+    env.Append(CPPDEFINES=["WEB_ENABLED", "UNIX_ENABLED"])

tools/windows.py

@@ -9,6 +9,7 @@ from SCons.Variables import *
 def options(opts):
     opts.Add(BoolVariable("use_mingw", "Use the MinGW compiler instead of MSVC - only effective on Windows", False))
     opts.Add(BoolVariable("use_clang_cl", "Use the clang driver instead of MSVC - only effective on Windows", False))
+    opts.Add(BoolVariable("use_static_cpp", "Link MinGW/MSVC C++ runtime libraries statically", True))
 
 
 def exists(env):
@@ -30,13 +31,18 @@ def generate(env):
         env.Tool("mslink")
 
         env.Append(CPPDEFINES=["TYPED_METHOD_BIND", "NOMINMAX"])
-        env.Append(CCFLAGS=["/EHsc"])
+        env.Append(CCFLAGS=["/utf-8"])
         env.Append(LINKFLAGS=["/WX"])
 
         if env["use_clang_cl"]:
             env["CC"] = "clang-cl"
             env["CXX"] = "clang-cl"
 
+        if env["use_static_cpp"]:
+            env.Append(CCFLAGS=["/MT"])
+        else:
+            env.Append(CCFLAGS=["/MD"])
+
     elif sys.platform == "win32" or sys.platform == "msys":
         env["use_mingw"] = True
         mingw.generate(env)
@@ -45,6 +51,18 @@ def generate(env):
         env["SHLIBPREFIX"] = ""
         # Want dll suffix
         env["SHLIBSUFFIX"] = ".dll"
+
+        env.Append(CCFLAGS=["-Wwrite-strings"])
+        env.Append(LINKFLAGS=["-Wl,--no-undefined"])
+        if env["use_static_cpp"]:
+            env.Append(
+                LINKFLAGS=[
+                    "-static",
+                    "-static-libgcc",
+                    "-static-libstdc++",
+                ]
+            )
+
         # Long line hack. Use custom spawn, quick AR append (to avoid files with the same names to override each other).
         my_spawn.configure(env)
 
@@ -60,13 +78,15 @@ def generate(env):
         # Want dll suffix
         env["SHLIBSUFFIX"] = ".dll"
 
-        # These options are for a release build even using target=debug
-        env.Append(CCFLAGS=["-O3", "-Wwrite-strings"])
-        env.Append(
-            LINKFLAGS=[
-                "--static",
-                "-Wl,--no-undefined",
-                "-static-libgcc",
-                "-static-libstdc++",
-            ]
-        )
+        env.Append(CCFLAGS=["-Wwrite-strings"])
+        env.Append(LINKFLAGS=["-Wl,--no-undefined"])
+        if env["use_static_cpp"]:
+            env.Append(
+                LINKFLAGS=[
+                    "-static",
+                    "-static-libgcc",
+                    "-static-libstdc++",
+                ]
+            )
+
+    env.Append(CPPDEFINES=["WINDOWS_ENABLED"])