godot-cpp/include/godot_cpp/core/builtin_ptrcall.hpp

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/*  builtin_ptrcall.hpp                                                  */
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#ifndef GODOT_BUILTIN_PTRCALL_HPP
#define GODOT_BUILTIN_PTRCALL_HPP

#include <godot/gdextension_interface.h>

#include <array>

namespace godot {

namespace internal {

template <class... Args>
void _call_builtin_constructor(const GDExtensionPtrConstructor constructor, GDExtensionTypePtr base, Args... args) {
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> call_args = { { (GDExtensionConstTypePtr)args... } };
	constructor(base, call_args.data());
}

template <class T, class... Args>
T _call_builtin_method_ptr_ret(const GDExtensionPtrBuiltInMethod method, GDExtensionTypePtr base, Args... args) {
	T ret;
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> call_args = { { (GDExtensionConstTypePtr)args... } };
	method(base, call_args.data(), &ret, sizeof...(Args));
	return ret;
}

template <class... Args>
void _call_builtin_method_ptr_no_ret(const GDExtensionPtrBuiltInMethod method, GDExtensionTypePtr base, Args... args) {
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> call_args = { { (GDExtensionConstTypePtr)args... } };
	method(base, call_args.data(), nullptr, sizeof...(Args));
}

template <class T>
T _call_builtin_operator_ptr(const GDExtensionPtrOperatorEvaluator op, GDExtensionConstTypePtr left, GDExtensionConstTypePtr right) {
	T ret;
	op(left, right, &ret);
	return ret;
}

template <class T>
T _call_builtin_ptr_getter(const GDExtensionPtrGetter getter, GDExtensionConstTypePtr base) {
	T ret;
	getter(base, &ret);
	return ret;
}

} // namespace internal

} // namespace godot

#endif // GODOT_BUILTIN_PTRCALL_HPP