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Rework GDCLASS macro to allow pure virtual functions

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(cherry picked from commit 5f350e2572)
This commit is contained in:
Chris Cranford
2024-01-12 15:25:56 -05:00
committed by David Snopek
parent 97214ecd7a
commit dc76664cea
4 changed files with 45 additions and 33 deletions
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31
include/godot_cpp/core/class_db.hpp
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@@ -112,6 +112,33 @@ private:
template <class T, bool is_abstract>
static void _register_class(bool p_virtual = false, bool p_exposed = true);
template <class T>
static GDExtensionObjectPtr _create_instance_func(void *data) {
if constexpr (!std::is_abstract_v<T>) {
T *new_object = memnew(T);
return new_object->_owner;
} else {
return nullptr;
}
}
template <class T>
static GDExtensionClassInstancePtr _recreate_instance_func(void *data, GDExtensionObjectPtr obj) {
if constexpr (!std::is_abstract_v<T>) {
#ifdef HOT_RELOAD_ENABLED
T *new_instance = (T *)memalloc(sizeof(T));
Wrapped::RecreateInstance recreate_data = { new_instance, obj, Wrapped::recreate_instance };
Wrapped::recreate_instance = &recreate_data;
memnew_placement(new_instance, T);
return new_instance;
#else
return nullptr;
#endif
} else {
return nullptr;
}
}
public:
template <class T>
static void register_class(bool p_virtual = false);
@@ -202,9 +229,9 @@ void ClassDB::_register_class(bool p_virtual, bool p_exposed) {
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 */
&_create_instance_func<T>, // GDExtensionClassCreateInstance create_instance_func; /* this one is mandatory */
T::free, // GDExtensionClassFreeInstance free_instance_func; /* this one is mandatory */
T::recreate, // GDExtensionClassRecreateInstance recreate_instance_func;
&_recreate_instance_func<T>, // GDExtensionClassRecreateInstance recreate_instance_func;
&ClassDB::get_virtual_func, // GDExtensionClassGetVirtual get_virtual_func;
nullptr, // GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
nullptr, // GDExtensionClassCallVirtualWithData call_virtual_func;