Sync classref with current source

classes/class_expression.rst

@@ -48,7 +48,7 @@ In the following example we use a :ref:`LineEdit<class_LineEdit>` node to write
     func _on_text_entered(command):
         var error = expression.parse(command, [])
         if error != OK:
-            print(get_error_text())
+            print(expression.get_error_text())
             return
         var result = expression.execute([], null, true)
         if not expression.has_execute_failed():
@@ -63,6 +63,8 @@ Method Descriptions
 
 Executes the expression that was previously parsed by :ref:`parse<class_Expression_method_parse>` and returns the result. Before you use the returned object, you should check if the method failed by calling :ref:`has_execute_failed<class_Expression_method_has_execute_failed>`.
 
+If you defined input variables in :ref:`parse<class_Expression_method_parse>`, you can specify their values in the inputs array, in the same order.
+
 .. _class_Expression_method_get_error_text:
 
 - :ref:`String<class_String>` **get_error_text** **(** **)** const
@@ -81,3 +83,5 @@ Returns ``true`` if :ref:`execute<class_Expression_method_execute>` has failed.
 
 Parses the expression and returns a :ref:`Error<enum_@GlobalScope_Error>`.
 
+You can optionally specify names of variables that may appear in the expression with ``input_names``, so that you can bind them when it gets executed.
+