163b59390c
b50053ce function_info: Implement equivalent_function_type_with_class git-subtree-dir: externals/mp git-subtree-split: b50053cef50385419c59fb3aebb78974547318bc
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/* This file is part of the mp project.
|
|
* Copyright (c) 2017 MerryMage
|
|
* SPDX-License-Identifier: 0BSD
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <cstddef>
|
|
#include <tuple>
|
|
|
|
#include <mp/typelist/list.h>
|
|
|
|
namespace mp {
|
|
|
|
template<class F>
|
|
struct function_info : function_info<decltype(&F::operator())> {};
|
|
|
|
template<class R, class... As>
|
|
struct function_info<R(As...)> {
|
|
using return_type = R;
|
|
using parameter_list = list<As...>;
|
|
static constexpr std::size_t parameter_count = sizeof...(As);
|
|
|
|
using equivalent_function_type = R(As...);
|
|
|
|
template<std::size_t I>
|
|
struct parameter {
|
|
static_assert(I < parameter_count, "Non-existent parameter");
|
|
using type = std::tuple_element_t<I, std::tuple<As...>>;
|
|
};
|
|
};
|
|
|
|
template<class R, class... As>
|
|
struct function_info<R(*)(As...)> : function_info<R(As...)> {};
|
|
|
|
template<class C, class R, class... As>
|
|
struct function_info<R(C::*)(As...)> : function_info<R(As...)> {
|
|
using class_type = C;
|
|
|
|
using equivalent_function_type_with_class = R(C*, As...);
|
|
};
|
|
|
|
template<class C, class R, class... As>
|
|
struct function_info<R(C::*)(As...) const> : function_info<R(As...)> {
|
|
using class_type = C;
|
|
|
|
using equivalent_function_type_with_class = R(C*, As...);
|
|
};
|
|
|
|
template<class F>
|
|
constexpr size_t parameter_count_v = function_info<F>::parameter_count;
|
|
|
|
template<class F>
|
|
using parameter_list = typename function_info<F>::parameter_list;
|
|
|
|
template<class F, std::size_t I>
|
|
using get_parameter = typename function_info<F>::template parameter<I>::type;
|
|
|
|
template<class F>
|
|
using equivalent_function_type = typename function_info<F>::equivalent_function_type;
|
|
|
|
template<class F>
|
|
using equivalent_function_type_with_class = typename function_info<F>::equivalent_function_type_with_class;
|
|
|
|
template<class F>
|
|
using return_type = typename function_info<F>::return_type;
|
|
|
|
template<class F>
|
|
using class_type = typename function_info<F>::class_type;
|
|
|
|
} // namespace mp
|