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488 lines
23 KiB
C++
488 lines
23 KiB
C++
/**************************************************************************/
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/* class_db.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef CLASS_DB_H
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#define CLASS_DB_H
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#include "core/object/method_bind.h"
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#include "core/object/object.h"
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#include "core/string/print_string.h"
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// Makes callable_mp readily available in all classes connecting signals.
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// Needs to come after method_bind and object have been included.
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#include "core/object/callable_method_pointer.h"
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#include "core/templates/hash_set.h"
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#include <type_traits>
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#define DEFVAL(m_defval) (m_defval)
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#ifdef DEBUG_METHODS_ENABLED
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struct MethodDefinition {
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StringName name;
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Vector<StringName> args;
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MethodDefinition() {}
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MethodDefinition(const char *p_name) :
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name(p_name) {}
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MethodDefinition(const StringName &p_name) :
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name(p_name) {}
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};
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MethodDefinition D_METHODP(const char *p_name, const char *const **p_args, uint32_t p_argcount);
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template <typename... VarArgs>
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MethodDefinition D_METHOD(const char *p_name, const VarArgs... p_args) {
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const char *args[sizeof...(p_args) + 1] = { p_args..., nullptr }; // +1 makes sure zero sized arrays are also supported.
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const char *const *argptrs[sizeof...(p_args) + 1];
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for (uint32_t i = 0; i < sizeof...(p_args); i++) {
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argptrs[i] = &args[i];
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}
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return D_METHODP(p_name, sizeof...(p_args) == 0 ? nullptr : (const char *const **)argptrs, sizeof...(p_args));
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}
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#else
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// When DEBUG_METHODS_ENABLED is set this will let the engine know
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// the argument names for easier debugging.
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#define D_METHOD(m_c, ...) m_c
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#endif
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class ClassDB {
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public:
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enum APIType {
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API_CORE,
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API_EDITOR,
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API_EXTENSION,
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API_EDITOR_EXTENSION,
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API_NONE
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};
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public:
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struct PropertySetGet {
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int index;
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StringName setter;
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StringName getter;
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MethodBind *_setptr = nullptr;
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MethodBind *_getptr = nullptr;
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Variant::Type type;
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};
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struct ClassInfo {
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APIType api = API_NONE;
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ClassInfo *inherits_ptr = nullptr;
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void *class_ptr = nullptr;
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ObjectGDExtension *gdextension = nullptr;
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HashMap<StringName, MethodBind *> method_map;
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HashMap<StringName, LocalVector<MethodBind *>> method_map_compatibility;
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HashMap<StringName, int64_t> constant_map;
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struct EnumInfo {
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List<StringName> constants;
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bool is_bitfield = false;
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};
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HashMap<StringName, EnumInfo> enum_map;
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HashMap<StringName, MethodInfo> signal_map;
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List<PropertyInfo> property_list;
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HashMap<StringName, PropertyInfo> property_map;
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#ifdef DEBUG_METHODS_ENABLED
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List<StringName> constant_order;
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List<StringName> method_order;
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HashSet<StringName> methods_in_properties;
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List<MethodInfo> virtual_methods;
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HashMap<StringName, MethodInfo> virtual_methods_map;
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HashMap<StringName, Vector<Error>> method_error_values;
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HashMap<StringName, List<StringName>> linked_properties;
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#endif
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HashMap<StringName, PropertySetGet> property_setget;
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StringName inherits;
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StringName name;
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bool disabled = false;
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bool exposed = false;
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bool is_virtual = false;
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Object *(*creation_func)() = nullptr;
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ClassInfo() {}
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~ClassInfo() {}
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};
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template <class T>
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static Object *creator() {
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return memnew(T);
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}
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static RWLock lock;
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static HashMap<StringName, ClassInfo> classes;
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static HashMap<StringName, StringName> resource_base_extensions;
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static HashMap<StringName, StringName> compat_classes;
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#ifdef DEBUG_METHODS_ENABLED
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static MethodBind *bind_methodfi(uint32_t p_flags, MethodBind *p_bind, bool p_compatibility, const MethodDefinition &method_name, const Variant **p_defs, int p_defcount);
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#else
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static MethodBind *bind_methodfi(uint32_t p_flags, MethodBind *p_bind, bool p_compatibility, const char *method_name, const Variant **p_defs, int p_defcount);
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#endif
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static APIType current_api;
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static HashMap<APIType, uint32_t> api_hashes_cache;
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static void _add_class2(const StringName &p_class, const StringName &p_inherits);
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static HashMap<StringName, HashMap<StringName, Variant>> default_values;
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static HashSet<StringName> default_values_cached;
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// Native structs, used by binder
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struct NativeStruct {
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String ccode; // C code to create the native struct, fields separated by ; Arrays accepted (even containing other structs), also function pointers. All types must be Godot types.
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uint64_t struct_size; // local size of struct, for comparison
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};
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static HashMap<StringName, NativeStruct> native_structs;
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private:
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// Non-locking variants of get_parent_class and is_parent_class.
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static StringName _get_parent_class(const StringName &p_class);
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static bool _is_parent_class(const StringName &p_class, const StringName &p_inherits);
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static void _bind_compatibility(ClassInfo *type, MethodBind *p_method);
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static MethodBind *_bind_vararg_method(MethodBind *p_bind, const StringName &p_name, const Vector<Variant> &p_default_args, bool p_compatibility);
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static void _bind_method_custom(const StringName &p_class, MethodBind *p_method, bool p_compatibility);
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public:
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// DO NOT USE THIS!!!!!! NEEDS TO BE PUBLIC BUT DO NOT USE NO MATTER WHAT!!!
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template <class T>
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static void _add_class() {
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_add_class2(T::get_class_static(), T::get_parent_class_static());
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}
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template <class T>
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static void register_class(bool p_virtual = false) {
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GLOBAL_LOCK_FUNCTION;
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T::initialize_class();
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ClassInfo *t = classes.getptr(T::get_class_static());
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ERR_FAIL_COND(!t);
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t->creation_func = &creator<T>;
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t->exposed = true;
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t->is_virtual = p_virtual;
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t->class_ptr = T::get_class_ptr_static();
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t->api = current_api;
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T::register_custom_data_to_otdb();
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}
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template <class T>
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static void register_abstract_class() {
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GLOBAL_LOCK_FUNCTION;
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T::initialize_class();
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ClassInfo *t = classes.getptr(T::get_class_static());
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ERR_FAIL_COND(!t);
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t->exposed = true;
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t->class_ptr = T::get_class_ptr_static();
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t->api = current_api;
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//nothing
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}
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static void register_extension_class(ObjectGDExtension *p_extension);
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static void unregister_extension_class(const StringName &p_class);
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template <class T>
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static Object *_create_ptr_func() {
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return T::create();
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}
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template <class T>
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static void register_custom_instance_class() {
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GLOBAL_LOCK_FUNCTION;
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T::initialize_class();
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ClassInfo *t = classes.getptr(T::get_class_static());
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ERR_FAIL_COND(!t);
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t->creation_func = &_create_ptr_func<T>;
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t->exposed = true;
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t->class_ptr = T::get_class_ptr_static();
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t->api = current_api;
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T::register_custom_data_to_otdb();
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}
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static void get_class_list(List<StringName> *p_classes);
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static void get_inheriters_from_class(const StringName &p_class, List<StringName> *p_classes);
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static void get_direct_inheriters_from_class(const StringName &p_class, List<StringName> *p_classes);
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static StringName get_parent_class_nocheck(const StringName &p_class);
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static StringName get_parent_class(const StringName &p_class);
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static StringName get_compatibility_remapped_class(const StringName &p_class);
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static bool class_exists(const StringName &p_class);
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static bool is_parent_class(const StringName &p_class, const StringName &p_inherits);
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static bool can_instantiate(const StringName &p_class);
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static bool is_virtual(const StringName &p_class);
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static Object *instantiate(const StringName &p_class);
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static void set_object_extension_instance(Object *p_object, const StringName &p_class, GDExtensionClassInstancePtr p_instance);
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static APIType get_api_type(const StringName &p_class);
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static uint32_t get_api_hash(APIType p_api);
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template <typename>
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struct member_function_traits;
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template <typename R, typename T, typename... Args>
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struct member_function_traits<R (T::*)(Args...)> {
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using return_type = R;
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};
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template <typename R, typename T, typename... Args>
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struct member_function_traits<R (T::*)(Args...) const> {
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using return_type = R;
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};
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template <typename R, typename... Args>
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struct member_function_traits<R (*)(Args...)> {
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using return_type = R;
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};
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template <class N, class M, typename... VarArgs>
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static MethodBind *bind_method(N p_method_name, M p_method, VarArgs... p_args) {
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Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
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const Variant *argptrs[sizeof...(p_args) + 1];
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for (uint32_t i = 0; i < sizeof...(p_args); i++) {
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argptrs[i] = &args[i];
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}
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MethodBind *bind = create_method_bind(p_method);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, false, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
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}
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template <class N, class M, typename... VarArgs>
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static MethodBind *bind_static_method(const StringName &p_class, N p_method_name, M p_method, VarArgs... p_args) {
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Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
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const Variant *argptrs[sizeof...(p_args) + 1];
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for (uint32_t i = 0; i < sizeof...(p_args); i++) {
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argptrs[i] = &args[i];
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}
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MethodBind *bind = create_static_method_bind(p_method);
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bind->set_instance_class(p_class);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, false, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
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}
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template <class N, class M, typename... VarArgs>
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static MethodBind *bind_compatibility_method(N p_method_name, M p_method, VarArgs... p_args) {
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Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
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const Variant *argptrs[sizeof...(p_args) + 1];
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for (uint32_t i = 0; i < sizeof...(p_args); i++) {
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argptrs[i] = &args[i];
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}
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MethodBind *bind = create_method_bind(p_method);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, true, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
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}
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template <class N, class M, typename... VarArgs>
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static MethodBind *bind_compatibility_static_method(const StringName &p_class, N p_method_name, M p_method, VarArgs... p_args) {
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Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
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const Variant *argptrs[sizeof...(p_args) + 1];
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for (uint32_t i = 0; i < sizeof...(p_args); i++) {
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argptrs[i] = &args[i];
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}
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MethodBind *bind = create_static_method_bind(p_method);
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bind->set_instance_class(p_class);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, true, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
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}
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template <class M>
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static MethodBind *bind_vararg_method(uint32_t p_flags, const StringName &p_name, M p_method, const MethodInfo &p_info = MethodInfo(), const Vector<Variant> &p_default_args = Vector<Variant>(), bool p_return_nil_is_variant = true) {
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GLOBAL_LOCK_FUNCTION;
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MethodBind *bind = create_vararg_method_bind(p_method, p_info, p_return_nil_is_variant);
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ERR_FAIL_COND_V(!bind, nullptr);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return _bind_vararg_method(bind, p_name, p_default_args, false);
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}
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template <class M>
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static MethodBind *bind_compatibility_vararg_method(uint32_t p_flags, const StringName &p_name, M p_method, const MethodInfo &p_info = MethodInfo(), const Vector<Variant> &p_default_args = Vector<Variant>(), bool p_return_nil_is_variant = true) {
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GLOBAL_LOCK_FUNCTION;
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MethodBind *bind = create_vararg_method_bind(p_method, p_info, p_return_nil_is_variant);
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ERR_FAIL_COND_V(!bind, nullptr);
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if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
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bind->set_return_type_is_raw_object_ptr(true);
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}
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return _bind_vararg_method(bind, p_name, p_default_args, true);
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}
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static void bind_method_custom(const StringName &p_class, MethodBind *p_method);
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static void bind_compatibility_method_custom(const StringName &p_class, MethodBind *p_method);
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static void add_signal(const StringName &p_class, const MethodInfo &p_signal);
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static bool has_signal(const StringName &p_class, const StringName &p_signal, bool p_no_inheritance = false);
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static bool get_signal(const StringName &p_class, const StringName &p_signal, MethodInfo *r_signal);
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static void get_signal_list(const StringName &p_class, List<MethodInfo> *p_signals, bool p_no_inheritance = false);
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static void add_property_group(const StringName &p_class, const String &p_name, const String &p_prefix = "", int p_indent_depth = 0);
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static void add_property_subgroup(const StringName &p_class, const String &p_name, const String &p_prefix = "", int p_indent_depth = 0);
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static void add_property_array_count(const StringName &p_class, const String &p_label, const StringName &p_count_property, const StringName &p_count_setter, const StringName &p_count_getter, const String &p_array_element_prefix, uint32_t p_count_usage = PROPERTY_USAGE_DEFAULT);
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static void add_property_array(const StringName &p_class, const StringName &p_path, const String &p_array_element_prefix);
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static void add_property(const StringName &p_class, const PropertyInfo &p_pinfo, const StringName &p_setter, const StringName &p_getter, int p_index = -1);
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static void set_property_default_value(const StringName &p_class, const StringName &p_name, const Variant &p_default);
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static void add_linked_property(const StringName &p_class, const String &p_property, const String &p_linked_property);
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static void get_property_list(const StringName &p_class, List<PropertyInfo> *p_list, bool p_no_inheritance = false, const Object *p_validator = nullptr);
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static bool get_property_info(const StringName &p_class, const StringName &p_property, PropertyInfo *r_info, bool p_no_inheritance = false, const Object *p_validator = nullptr);
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static void get_linked_properties_info(const StringName &p_class, const StringName &p_property, List<StringName> *r_properties, bool p_no_inheritance = false);
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static bool set_property(Object *p_object, const StringName &p_property, const Variant &p_value, bool *r_valid = nullptr);
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static bool get_property(Object *p_object, const StringName &p_property, Variant &r_value);
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static bool has_property(const StringName &p_class, const StringName &p_property, bool p_no_inheritance = false);
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static int get_property_index(const StringName &p_class, const StringName &p_property, bool *r_is_valid = nullptr);
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static Variant::Type get_property_type(const StringName &p_class, const StringName &p_property, bool *r_is_valid = nullptr);
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static StringName get_property_setter(const StringName &p_class, const StringName &p_property);
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static StringName get_property_getter(const StringName &p_class, const StringName &p_property);
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static bool has_method(const StringName &p_class, const StringName &p_method, bool p_no_inheritance = false);
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static void set_method_flags(const StringName &p_class, const StringName &p_method, int p_flags);
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static void get_method_list(const StringName &p_class, List<MethodInfo> *p_methods, bool p_no_inheritance = false, bool p_exclude_from_properties = false);
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static bool get_method_info(const StringName &p_class, const StringName &p_method, MethodInfo *r_info, bool p_no_inheritance = false, bool p_exclude_from_properties = false);
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static MethodBind *get_method(const StringName &p_class, const StringName &p_name);
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static MethodBind *get_method_with_compatibility(const StringName &p_class, const StringName &p_name, uint64_t p_hash, bool *r_method_exists = nullptr, bool *r_is_deprecated = nullptr);
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static Vector<uint32_t> get_method_compatibility_hashes(const StringName &p_class, const StringName &p_name);
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static void add_virtual_method(const StringName &p_class, const MethodInfo &p_method, bool p_virtual = true, const Vector<String> &p_arg_names = Vector<String>(), bool p_object_core = false);
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static void get_virtual_methods(const StringName &p_class, List<MethodInfo> *p_methods, bool p_no_inheritance = false);
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static void bind_integer_constant(const StringName &p_class, const StringName &p_enum, const StringName &p_name, int64_t p_constant, bool p_is_bitfield = false);
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static void get_integer_constant_list(const StringName &p_class, List<String> *p_constants, bool p_no_inheritance = false);
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static int64_t get_integer_constant(const StringName &p_class, const StringName &p_name, bool *p_success = nullptr);
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static bool has_integer_constant(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
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static StringName get_integer_constant_enum(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
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static StringName get_integer_constant_bitfield(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
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static void get_enum_list(const StringName &p_class, List<StringName> *p_enums, bool p_no_inheritance = false);
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static void get_enum_constants(const StringName &p_class, const StringName &p_enum, List<StringName> *p_constants, bool p_no_inheritance = false);
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static bool has_enum(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
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static bool is_enum_bitfield(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
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static void set_method_error_return_values(const StringName &p_class, const StringName &p_method, const Vector<Error> &p_values);
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static Vector<Error> get_method_error_return_values(const StringName &p_class, const StringName &p_method);
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static Variant class_get_default_property_value(const StringName &p_class, const StringName &p_property, bool *r_valid = nullptr);
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static void set_class_enabled(const StringName &p_class, bool p_enable);
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static bool is_class_enabled(const StringName &p_class);
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static bool is_class_exposed(const StringName &p_class);
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static void add_resource_base_extension(const StringName &p_extension, const StringName &p_class);
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static void get_resource_base_extensions(List<String> *p_extensions);
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static void get_extensions_for_type(const StringName &p_class, List<String> *p_extensions);
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static bool is_resource_extension(const StringName &p_extension);
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static void add_compatibility_class(const StringName &p_class, const StringName &p_fallback);
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static StringName get_compatibility_class(const StringName &p_class);
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static void set_current_api(APIType p_api);
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static APIType get_current_api();
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static void cleanup_defaults();
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static void cleanup();
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static void register_native_struct(const StringName &p_name, const String &p_code, uint64_t p_current_size);
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static void get_native_struct_list(List<StringName> *r_names);
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static String get_native_struct_code(const StringName &p_name);
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static uint64_t get_native_struct_size(const StringName &p_name); // Used for asserting
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};
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#define BIND_ENUM_CONSTANT(m_constant) \
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::ClassDB::bind_integer_constant(get_class_static(), __constant_get_enum_name(m_constant, #m_constant), #m_constant, m_constant);
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#define BIND_BITFIELD_FLAG(m_constant) \
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::ClassDB::bind_integer_constant(get_class_static(), __constant_get_bitfield_name(m_constant, #m_constant), #m_constant, m_constant, true);
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#define BIND_CONSTANT(m_constant) \
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::ClassDB::bind_integer_constant(get_class_static(), StringName(), #m_constant, m_constant);
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#ifdef DEBUG_METHODS_ENABLED
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_FORCE_INLINE_ void errarray_add_str(Vector<Error> &arr) {
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}
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_FORCE_INLINE_ void errarray_add_str(Vector<Error> &arr, const Error &p_err) {
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arr.push_back(p_err);
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}
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template <class... P>
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_FORCE_INLINE_ void errarray_add_str(Vector<Error> &arr, const Error &p_err, P... p_args) {
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arr.push_back(p_err);
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errarray_add_str(arr, p_args...);
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}
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template <class... P>
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_FORCE_INLINE_ Vector<Error> errarray(P... p_args) {
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Vector<Error> arr;
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errarray_add_str(arr, p_args...);
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return arr;
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}
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#define BIND_METHOD_ERR_RETURN_DOC(m_method, ...) \
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::ClassDB::set_method_error_return_values(get_class_static(), m_method, errarray(__VA_ARGS__));
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#else
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#define BIND_METHOD_ERR_RETURN_DOC(m_method, ...)
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#endif
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#define GDREGISTER_CLASS(m_class) \
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if (m_class::_class_is_enabled) { \
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::ClassDB::register_class<m_class>(); \
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}
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#define GDREGISTER_VIRTUAL_CLASS(m_class) \
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if (m_class::_class_is_enabled) { \
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::ClassDB::register_class<m_class>(true); \
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}
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#define GDREGISTER_ABSTRACT_CLASS(m_class) \
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if (m_class::_class_is_enabled) { \
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::ClassDB::register_abstract_class<m_class>(); \
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}
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#define GDREGISTER_NATIVE_STRUCT(m_class, m_code) ClassDB::register_native_struct(#m_class, m_code, sizeof(m_class))
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#include "core/disabled_classes.gen.h"
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#endif // CLASS_DB_H
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