forked from OSchip/llvm-project
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
// -*- 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_BIND_FRONT_H
|
|
#define _LIBCPP___FUNCTIONAL_BIND_FRONT_H
|
|
|
|
#include <__config>
|
|
#include <__functional/perfect_forward.h>
|
|
#include <__functional/invoke.h>
|
|
#include <type_traits>
|
|
#include <utility>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 17
|
|
|
|
struct __bind_front_op
|
|
{
|
|
template<class... _Args>
|
|
constexpr static auto __call(_Args&&... __args)
|
|
noexcept(noexcept(_VSTD::invoke(_VSTD::forward<_Args>(__args)...)))
|
|
-> decltype( _VSTD::invoke(_VSTD::forward<_Args>(__args)...))
|
|
{ return _VSTD::invoke(_VSTD::forward<_Args>(__args)...); }
|
|
};
|
|
|
|
template<class _Fn, class... _Args,
|
|
class = _EnableIf<conjunction<is_constructible<decay_t<_Fn>, _Fn>,
|
|
is_move_constructible<decay_t<_Fn>>,
|
|
is_constructible<decay_t<_Args>, _Args>...,
|
|
is_move_constructible<decay_t<_Args>>...
|
|
>::value>>
|
|
constexpr auto bind_front(_Fn&& __f, _Args&&... __args)
|
|
{
|
|
return __perfect_forward<__bind_front_op, _Fn, _Args...>(_VSTD::forward<_Fn>(__f),
|
|
_VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER > 17
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___FUNCTIONAL_BIND_FRONT_H
|