blob: 77c8136d8785f980e2b55d54d5d1bd345f50b578 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___FUNCTIONAL_MEM_FN_H
#define _LIBCPP___FUNCTIONAL_MEM_FN_H
#include <__config>
#include <__functional/binary_function.h>
#include <__functional/invoke.h>
#include <__functional/weak_result_type.h>
#include <__utility/forward.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp>
class __mem_fn : public __weak_result_type<_Tp>
{
public:
// types
typedef _Tp type;
private:
type __f_;
public:
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
__mem_fn(type __f) _NOEXCEPT : __f_(__f) {}
// invoke
template <class... _ArgTypes>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
typename __invoke_return<type, _ArgTypes...>::type
operator() (_ArgTypes&&... __args) const {
return std::__invoke(__f_, std::forward<_ArgTypes>(__args)...);
}
};
template<class _Rp, class _Tp>
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
__mem_fn<_Rp _Tp::*>
mem_fn(_Rp _Tp::* __pm) _NOEXCEPT
{
return __mem_fn<_Rp _Tp::*>(__pm);
}
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___FUNCTIONAL_MEM_FN_H
|