forked from OSchip/llvm-project
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
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___UTILITY_IN_PLACE_H
|
|
#define _LIBCPP___UTILITY_IN_PLACE_H
|
|
|
|
#include <__config>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
|
|
struct _LIBCPP_TYPE_VIS in_place_t {
|
|
explicit in_place_t() = default;
|
|
};
|
|
inline constexpr in_place_t in_place{};
|
|
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS in_place_type_t {
|
|
explicit in_place_type_t() = default;
|
|
};
|
|
template <class _Tp>
|
|
inline constexpr in_place_type_t<_Tp> in_place_type{};
|
|
|
|
template <size_t _Idx>
|
|
struct _LIBCPP_TEMPLATE_VIS in_place_index_t {
|
|
explicit in_place_index_t() = default;
|
|
};
|
|
template <size_t _Idx>
|
|
inline constexpr in_place_index_t<_Idx> in_place_index{};
|
|
|
|
template <class _Tp> struct __is_inplace_type_imp : false_type {};
|
|
template <class _Tp> struct __is_inplace_type_imp<in_place_type_t<_Tp>> : true_type {};
|
|
|
|
template <class _Tp>
|
|
using __is_inplace_type = __is_inplace_type_imp<__uncvref_t<_Tp>>;
|
|
|
|
template <class _Tp> struct __is_inplace_index_imp : false_type {};
|
|
template <size_t _Idx> struct __is_inplace_index_imp<in_place_index_t<_Idx>> : true_type {};
|
|
|
|
template <class _Tp>
|
|
using __is_inplace_index = __is_inplace_index_imp<__uncvref_t<_Tp>>;
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___UTILITY_IN_PLACE_H
|