Cherry-picks for the godot-cpp 4.2 branch - 1st batch

README.md

@@ -58,7 +58,7 @@ 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
 [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)
+and the [godot-cpp issue tracker](https://github.com/godotengine/godot-cpp/issues)
 for a list of known issues, and be sure to provide feedback on issues and PRs
 which affect your use of this extension.
 
@@ -74,7 +74,10 @@ so formatting is done before your changes are submitted.
 
 ## Getting started
 
-It's a bit similar to what it was for 3.x but also a bit different.
+You need the same C++ pre-requisites installed that are required for the `godot` repository. Follow the [official build instructions for your target platform](https://docs.godotengine.org/en/latest/contributing/development/compiling/index.html#building-for-target-platforms).
+
+Getting started with GDExtensions is a bit similar to what it was for 3.x but also a bit different.
+
 This new approach is much more akin to how core Godot modules are structured.
 
 Compiling this repository generates a static library to be linked with your shared lib,

binding_generator.py

@@ -1778,9 +1778,9 @@ def generate_global_constant_binds(api, output_dir):
             continue
 
         if enum_def["is_bitfield"]:
-            header.append(f'VARIANT_BITFIELD_CAST(godot::{enum_def["name"]});')
+            header.append(f'VARIANT_BITFIELD_CAST({enum_def["name"]});')
         else:
-            header.append(f'VARIANT_ENUM_CAST(godot::{enum_def["name"]});')
+            header.append(f'VARIANT_ENUM_CAST({enum_def["name"]});')
 
     # Variant::Type is not a global enum, but only one line, it is worth to place in this file instead of creating new file.
     header.append(f"VARIANT_ENUM_CAST(godot::Variant::Type);")
@@ -2433,6 +2433,7 @@ def get_operator_id_name(op):
         "unary-": "negate",
         "unary+": "positive",
         "%": "module",
+        "**": "power",
         "<<": "shift_left",
         ">>": "shift_right",
         "&": "bit_and",

include/godot_cpp/classes/wrapped.hpp

@@ -48,6 +48,7 @@ typedef void GodotObject;
 // Base for all engine classes, to contain the pointer to the engine instance.
 class Wrapped {
 	friend class GDExtensionBinding;
+	friend class ClassDB;
 	friend void postinitialize_handler(Wrapped *);
 
 protected:
@@ -131,17 +132,6 @@ struct EngineClassRegistration {
 
 } // namespace godot
 
-#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
@@ -226,15 +216,6 @@ public:
 		return m_inherits::get_class_static();                                                                                                                                         \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \
-	static GDExtensionObjectPtr create(void *data) {                                                                                                                                   \
-		m_class *new_object = memnew(m_class);                                                                                                                                         \
-		return new_object->_owner;                                                                                                                                                     \
-	}                                                                                                                                                                                  \
-                                                                                                                                                                                       \
-	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()) {                                                                                                     \
@@ -437,14 +418,6 @@ public:
 		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) {                                                                                                                    \
 	}                                                                                                                                                                                  \
                                                                                                                                                                                        \

include/godot_cpp/core/binder_common.hpp

@@ -281,13 +281,13 @@ void call_with_variant_args(T *p_instance, void (T::*p_method)(P...), const Vari
 #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);
+		r_error.expected = (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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -299,13 +299,13 @@ void call_with_variant_args_ret(T *p_instance, R (T::*p_method)(P...), const Var
 #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);
+		r_error.expected = (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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -317,13 +317,13 @@ void call_with_variant_args_retc(T *p_instance, R (T::*p_method)(P...) const, co
 #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);
+		r_error.expected = (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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -335,7 +335,7 @@ void call_with_variant_args_dv(T *p_instance, void (T::*p_method)(P...), const G
 #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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -346,7 +346,7 @@ void call_with_variant_args_dv(T *p_instance, void (T::*p_method)(P...), const G
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = (int32_t)sizeof...(P);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -370,7 +370,7 @@ void call_with_variant_argsc_dv(T *p_instance, void (T::*p_method)(P...) const,
 #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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -381,7 +381,7 @@ void call_with_variant_argsc_dv(T *p_instance, void (T::*p_method)(P...) const,
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = (int32_t)sizeof...(P);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -405,7 +405,7 @@ void call_with_variant_args_ret_dv(T *p_instance, R (T::*p_method)(P...), const
 #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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -416,7 +416,7 @@ void call_with_variant_args_ret_dv(T *p_instance, R (T::*p_method)(P...), const
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = (int32_t)sizeof...(P);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -440,7 +440,7 @@ void call_with_variant_args_retc_dv(T *p_instance, R (T::*p_method)(P...) const,
 #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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -451,7 +451,7 @@ void call_with_variant_args_retc_dv(T *p_instance, R (T::*p_method)(P...) const,
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = (int32_t)sizeof...(P);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -552,7 +552,7 @@ void call_with_variant_args_static_dv(void (*p_method)(P...), const GDExtensionC
 #ifdef DEBUG_ENABLED
 	if ((size_t)p_argcount > sizeof...(P)) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
-		r_error.argument = sizeof...(P);
+		r_error.expected = sizeof...(P);
 		return;
 	}
 #endif
@@ -563,7 +563,7 @@ void call_with_variant_args_static_dv(void (*p_method)(P...), const GDExtensionC
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = sizeof...(P);
+		r_error.expected = sizeof...(P);
 		return;
 	}
 #endif
@@ -597,13 +597,13 @@ void call_with_variant_args_static_ret(R (*p_method)(P...), const Variant **p_ar
 #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);
+		r_error.expected = (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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -615,13 +615,13 @@ void call_with_variant_args_static_ret(void (*p_method)(P...), const Variant **p
 #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);
+		r_error.expected = (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);
+		r_error.expected = (int32_t)sizeof...(P);
 		return;
 	}
 #endif
@@ -644,7 +644,7 @@ void call_with_variant_args_static_ret_dv(R (*p_method)(P...), const GDExtension
 #ifdef DEBUG_ENABLED
 	if ((size_t)p_argcount > sizeof...(P)) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_MANY_ARGUMENTS;
-		r_error.argument = sizeof...(P);
+		r_error.expected = sizeof...(P);
 		return;
 	}
 #endif
@@ -655,7 +655,7 @@ void call_with_variant_args_static_ret_dv(R (*p_method)(P...), const GDExtension
 #ifdef DEBUG_ENABLED
 	if (missing > dvs) {
 		r_error.error = GDEXTENSION_CALL_ERROR_TOO_FEW_ARGUMENTS;
-		r_error.argument = sizeof...(P);
+		r_error.expected = sizeof...(P);
 		return;
 	}
 #endif

include/godot_cpp/core/class_db.hpp

@@ -112,6 +112,33 @@ class ClassDB {
 	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;

include/godot_cpp/variant/aabb.hpp

@@ -201,11 +201,11 @@ inline bool AABB::encloses(const AABB &p_aabb) const {
 
 	return (
 			(src_min.x <= dst_min.x) &&
-			(src_max.x > dst_max.x) &&
+			(src_max.x >= dst_max.x) &&
 			(src_min.y <= dst_min.y) &&
-			(src_max.y > dst_max.y) &&
+			(src_max.y >= dst_max.y) &&
 			(src_min.z <= dst_min.z) &&
-			(src_max.z > dst_max.z));
+			(src_max.z >= dst_max.z));
 }
 
 Vector3 AABB::get_support(const Vector3 &p_normal) const {

include/godot_cpp/variant/variant.hpp

@@ -122,6 +122,7 @@ class Variant {
 		OP_NEGATE,
 		OP_POSITIVE,
 		OP_MODULE,
+		OP_POWER,
 		// bitwise
 		OP_SHIFT_LEFT,
 		OP_SHIFT_RIGHT,
@@ -356,6 +357,12 @@ String vformat(const String &p_text, const VarArgs... p_args) {
 
 #include <godot_cpp/variant/builtin_vararg_methods.hpp>
 
+#ifdef REAL_T_IS_DOUBLE
+using PackedRealArray = PackedFloat64Array;
+#else
+using PackedRealArray = PackedFloat32Array;
+#endif // REAL_T_IS_DOUBLE
+
 } // namespace godot
 
 #endif // GODOT_VARIANT_HPP

src/godot.cpp

@@ -271,7 +271,12 @@ GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_ge
 	} else if (internal::godot_version.minor != GODOT_VERSION_MINOR) {
 		compatible = internal::godot_version.minor > GODOT_VERSION_MINOR;
 	} else {
+#if GODOT_VERSION_PATCH > 0
 		compatible = internal::godot_version.patch >= GODOT_VERSION_PATCH;
+#else
+		// Prevent -Wtype-limits warning due to unsigned comparison.
+		compatible = true;
+#endif
 	}
 	if (!compatible) {
 		// We need to use snprintf() here because vformat() uses Variant, and we haven't loaded