Added `ClassDB::bind_static_vararg_method()` to bind static vararg functions.

include/godot_cpp/core/class_db.hpp

@@ -127,6 +127,9 @@ public:
 	template <class M>
 	static MethodBind *bind_vararg_method(uint32_t p_flags, StringName p_name, M p_method, const MethodInfo &p_info = MethodInfo(), const std::vector<Variant> &p_default_args = std::vector<Variant>{}, bool p_return_nil_is_variant = true);
 
+	template <class M>
+	static MethodBind *bind_static_vararg_method(uint32_t p_flags, StringName p_class, StringName p_name, M p_method, const MethodInfo &p_info = MethodInfo(), const std::vector<Variant> &p_default_args = std::vector<Variant>{}, bool p_return_nil_is_variant = true);
+
 	static void add_property_group(const StringName &p_class, const String &p_name, const String &p_prefix);
 	static void add_property_subgroup(const StringName &p_class, const String &p_name, const String &p_prefix);
 	static void add_property(const StringName &p_class, const PropertyInfo &p_pinfo, const StringName &p_setter, const StringName &p_getter, int p_index = -1);
@@ -288,6 +291,37 @@ MethodBind *ClassDB::bind_vararg_method(uint32_t p_flags, StringName p_name, M p
 	return bind;
 }
 
+template <class M>
+MethodBind *ClassDB::bind_static_vararg_method(uint32_t p_flags, StringName p_class, 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);
+
+	bind->set_name(p_name);
+	bind->set_default_arguments(p_default_args);
+	bind->set_instance_class(p_class);
+
+	std::unordered_map<StringName, ClassInfo>::iterator type_it = classes.find(p_class);
+	if (type_it == classes.end()) {
+		memdelete(bind);
+		ERR_FAIL_V_MSG(nullptr, String("Class '{0}' doesn't exist.").format(Array::make(p_class)));
+	}
+
+	ClassInfo &type = type_it->second;
+
+	if (type.method_map.find(p_name) != type.method_map.end()) {
+		memdelete(bind);
+		ERR_FAIL_V_MSG(nullptr, String("Binding duplicate method: {0}::{1}.").format(Array::make(p_class, p_method)));
+	}
+
+	// register our method bind within our plugin
+	type.method_map[p_name] = bind;
+
+	// and register with godot
+	bind_method_godot(type.name, bind);
+
+	return bind;
+}
+
 #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>();

include/godot_cpp/core/method_bind.hpp

@@ -267,6 +267,120 @@ MethodBind *create_vararg_method_bind(R (T::*p_method)(const Variant **, GDExten
 	return a;
 }
 
+template <class Derived, class R, bool should_returns>
+class MethodBindVarArgBaseS : public MethodBind {
+protected:
+	R(*function)
+	(const Variant **, GDExtensionInt, GDExtensionCallError &);
+	std::vector<PropertyInfo> arguments;
+
+public:
+	virtual PropertyInfo gen_argument_type_info(int p_arg) const {
+		if (p_arg < 0) {
+			return _gen_return_type_info();
+		} else if ((size_t)(p_arg) < arguments.size()) {
+			return arguments[p_arg];
+		} else {
+			return make_property_info(Variant::Type::NIL, "vararg", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
+		}
+	}
+
+	virtual GDExtensionVariantType gen_argument_type(int p_arg) const {
+		return static_cast<GDExtensionVariantType>(gen_argument_type_info(p_arg).type);
+	}
+
+	virtual GDExtensionClassMethodArgumentMetadata get_argument_metadata(int) const {
+		return GDEXTENSION_METHOD_ARGUMENT_METADATA_NONE;
+	}
+
+	virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDExtensionConstTypePtr *p_args, GDExtensionTypePtr r_return) const {
+		ERR_FAIL(); // Can't call.
+	}
+
+	MethodBindVarArgBaseS(
+			R (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &),
+			const MethodInfo &p_method_info,
+			bool p_return_nil_is_variant) :
+			function(p_function) {
+		set_vararg(true);
+		set_argument_count(p_method_info.arguments.size());
+		if (p_method_info.arguments.size()) {
+			arguments = p_method_info.arguments;
+
+			std::vector<StringName> names;
+			names.reserve(p_method_info.arguments.size());
+			for (size_t i = 0; i < p_method_info.arguments.size(); i++) {
+				names.push_back(p_method_info.arguments[i].name);
+			}
+			set_argument_names(names);
+		}
+		generate_argument_types((int)p_method_info.arguments.size());
+		set_return(should_returns);
+		set_static(true);
+	}
+
+	~MethodBindVarArgBaseS() {}
+
+private:
+	PropertyInfo _gen_return_type_info() const {
+		return reinterpret_cast<const Derived *>(this)->_gen_return_type_info_impl();
+	}
+};
+
+class MethodBindVarArgTS : public MethodBindVarArgBaseS<MethodBindVarArgTS, void, false> {
+	friend class MethodBindVarArgBaseS<MethodBindVarArgTS, void, false>;
+
+public:
+	virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionCallError &r_error) const {
+		(void)p_instance; // unused
+		MethodBindVarArgBaseS<MethodBindVarArgTS, void, false>::function((const Variant **)p_args, p_argument_count, r_error);
+		return {};
+	}
+
+	MethodBindVarArgTS(
+			void (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &),
+			const MethodInfo &p_method_info,
+			bool p_return_nil_is_variant) :
+			MethodBindVarArgBaseS<MethodBindVarArgTS, void, false>(p_function, p_method_info, p_return_nil_is_variant) {
+	}
+
+private:
+	PropertyInfo _gen_return_type_info_impl() const {
+		return {};
+	}
+};
+
+MethodBind *create_vararg_method_bind(void (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &), const MethodInfo &p_info, bool p_return_nil_is_variant);
+
+template <class R>
+class MethodBindVarArgTRS : public MethodBindVarArgBaseS<MethodBindVarArgTRS<R>, R, true> {
+	friend class MethodBindVarArgBaseS<MethodBindVarArgTRS, R, true>;
+
+public:
+	virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionCallError &r_error) const {
+		call_with_variant_args_static_dv(MethodBindVarArgBaseS<MethodBindVarArgTRS<R>, R, true>::function, p_args, p_argument_count, r_error);
+		return {};
+	}
+
+	MethodBindVarArgTRS(
+			void (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &),
+			const MethodInfo &p_method_info,
+			bool p_return_nil_is_variant) :
+			MethodBindVarArgBaseS<MethodBindVarArgTRS<R>, R, true>(p_function, p_method_info, p_return_nil_is_variant) {
+	}
+
+private:
+	PropertyInfo _gen_return_type_info_impl() const {
+		return {};
+	}
+};
+
+template <class R>
+MethodBind *create_vararg_method_bind(R (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &), const MethodInfo &p_info, bool p_return_nil_is_variant) {
+	MethodBind *a = memnew((MethodBindVarArgTRS<R>)(p_function, p_info, p_return_nil_is_variant));
+	return a;
+}
+
 #ifndef TYPED_METHOD_BIND
 class _gde_UnexistingClass;
 #define MB_T _gde_UnexistingClass

src/core/method_bind.cpp

@@ -110,4 +110,9 @@ MethodBind::~MethodBind() {
 	}
 }
 
+MethodBind *create_vararg_method_bind(void (*p_function)(const Variant **, GDExtensionInt, GDExtensionCallError &), const MethodInfo &p_info, bool p_return_nil_is_variant) {
+	MethodBind *a = memnew((MethodBindVarArgTS)(p_function, p_info, p_return_nil_is_variant));
+	return a;
+}
+
 } // namespace godot