godot-cpp/include/godot_cpp/variant/callable_method_pointer.hpp

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/**************************************************************************/
/* callable_method_pointer.hpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/**************************************************************************/
#ifndef GODOT_CALLABLE_METHOD_POINTER_HPP
#define GODOT_CALLABLE_METHOD_POINTER_HPP
#include <godot_cpp/core/binder_common.hpp>
#include <godot_cpp/variant/variant.hpp>
namespace godot {
class CallableCustomMethodPointerBase : public CallableCustomBase {
};
namespace internal {
Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer);
} // namespace internal
//
// No return value.
//
template <class T, class... P>
class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
T *instance;
void (T::*method)(P...);
public:
virtual ObjectID get_object() const override {
return ObjectID(instance->get_instance_id());
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
call_with_variant_args(instance, method, p_arguments, p_argcount, r_call_error);
}
CallableCustomMethodPointer(T *p_instance, void (T::*p_method)(P...)) {
instance = p_instance;
method = p_method;
}
};
template <class T, class... P>
Callable create_custom_callable_function_pointer(T *p_instance, void (T::*p_method)(P...)) {
typedef CallableCustomMethodPointer<T, P...> CCMP;
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
return ::godot::internal::create_callable_from_ccmp(ccmp);
}
//
// With return value.
//
template <class T, class R, class... P>
class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
T *instance;
R(T::*method)
(P...);
public:
virtual ObjectID get_object() const override {
return ObjectID(instance->get_instance_id());
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
call_with_variant_args_ret(instance, method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRet(T *p_instance, R (T::*p_method)(P...)) {
instance = p_instance;
method = p_method;
}
};
template <class T, class R, class... P>
Callable create_custom_callable_function_pointer(T *p_instance, R (T::*p_method)(P...)) {
typedef CallableCustomMethodPointerRet<T, R, P...> CCMP; // Messes with memnew otherwise.
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
return ::godot::internal::create_callable_from_ccmp(ccmp);
}
//
// Const with return value.
//
template <class T, class R, class... P>
class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
T *instance;
R(T::*method)
(P...) const;
public:
virtual ObjectID get_object() const override {
return ObjectID(instance->get_instance_id());
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
call_with_variant_args_retc(instance, method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRetC(const T *p_instance, R (T::*p_method)(P...) const) {
instance = const_cast<T *>(p_instance);
method = p_method;
}
};
template <class T, class R, class... P>
Callable create_custom_callable_function_pointer(const T *p_instance, R (T::*p_method)(P...) const) {
typedef CallableCustomMethodPointerRetC<T, R, P...> CCMP; // Messes with memnew otherwise.
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
return ::godot::internal::create_callable_from_ccmp(ccmp);
}
//
// Static method with no return value.
//
template <class... P>
class CallableCustomStaticMethodPointer : public CallableCustomMethodPointerBase {
void (*method)(P...);
public:
virtual ObjectID get_object() const override {
return ObjectID();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
call_with_variant_args_static_ret(method, p_arguments, p_argcount, r_return_value, r_call_error);
r_return_value = Variant();
}
CallableCustomStaticMethodPointer(void (*p_method)(P...)) {
method = p_method;
}
};
template <class... P>
Callable create_custom_callable_static_function_pointer(void (*p_method)(P...)) {
typedef CallableCustomStaticMethodPointer<P...> CCMP;
CCMP *ccmp = memnew(CCMP(p_method));
return ::godot::internal::create_callable_from_ccmp(ccmp);
}
//
// Static method with return value.
//
template <class R, class... P>
class CallableCustomStaticMethodPointerRet : public CallableCustomMethodPointerBase {
R(*method)
(P...);
public:
virtual ObjectID get_object() const override {
return ObjectID();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
call_with_variant_args_static_ret(method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomStaticMethodPointerRet(R (*p_method)(P...)) {
method = p_method;
}
};
template <class R, class... P>
Callable create_custom_callable_static_function_pointer(R (*p_method)(P...)) {
typedef CallableCustomStaticMethodPointerRet<R, P...> CCMP;
CCMP *ccmp = memnew(CCMP(p_method));
return ::godot::internal::create_callable_from_ccmp(ccmp);
}
//
// The API:
//
#define callable_mp(I, M) ::godot::create_custom_callable_function_pointer(I, M)
#define callable_mp_static(M) ::godot::create_custom_callable_static_function_pointer(M)
} // namespace godot
#endif // GODOT_CALLABLE_METHOD_POINTER_HPP