4f15267d3d
This change is almost fully mechanical. The only interesting change is in `generate_feature_test_macro_components.py` to generate `_LIBCPP_STD_VER >=` instead. To avoid churn in the git-blame this commit should be added to the `.git-blame-ignore-revs` once committed. Reviewed By: ldionne, var-const, #libc Spies: jloser, libcxx-commits, arichardson, arphaman, wenlei Differential Revision: https://reviews.llvm.org/D143962
59 lines
1.9 KiB
C++
59 lines
1.9 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/invoke.h>
|
|
#include <__functional/perfect_forward.h>
|
|
#include <__utility/forward.h>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
struct __bind_front_op {
|
|
template <class ..._Args>
|
|
_LIBCPP_HIDE_FROM_ABI
|
|
constexpr auto operator()(_Args&& ...__args) const
|
|
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 ..._BoundArgs>
|
|
struct __bind_front_t : __perfect_forward<__bind_front_op, _Fn, _BoundArgs...> {
|
|
using __perfect_forward<__bind_front_op, _Fn, _BoundArgs...>::__perfect_forward;
|
|
};
|
|
|
|
template <class _Fn, class... _Args, class = enable_if_t<
|
|
_And<
|
|
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
|
|
>>
|
|
_LIBCPP_HIDE_FROM_ABI
|
|
constexpr auto bind_front(_Fn&& __f, _Args&&... __args) {
|
|
return __bind_front_t<decay_t<_Fn>, decay_t<_Args>...>(_VSTD::forward<_Fn>(__f), _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___FUNCTIONAL_BIND_FRONT_H
|