176d0caaeSpatrick //===----------------------------------------------------------------------===// 276d0caaeSpatrick // 376d0caaeSpatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 476d0caaeSpatrick // See https://llvm.org/LICENSE.txt for license information. 576d0caaeSpatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 676d0caaeSpatrick // 776d0caaeSpatrick //===----------------------------------------------------------------------===// 876d0caaeSpatrick 976d0caaeSpatrick #ifndef _LIBCPP___UTILITY_IN_PLACE_H 1076d0caaeSpatrick #define _LIBCPP___UTILITY_IN_PLACE_H 1176d0caaeSpatrick 1276d0caaeSpatrick #include <__config> 13*4bdff4beSrobert #include <__type_traits/remove_cvref.h> 14*4bdff4beSrobert #include <cstddef> 1576d0caaeSpatrick 1676d0caaeSpatrick #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1776d0caaeSpatrick # pragma GCC system_header 1876d0caaeSpatrick #endif 1976d0caaeSpatrick 2076d0caaeSpatrick _LIBCPP_BEGIN_NAMESPACE_STD 2176d0caaeSpatrick 2276d0caaeSpatrick #if _LIBCPP_STD_VER > 14 2376d0caaeSpatrick 2476d0caaeSpatrick struct _LIBCPP_TYPE_VIS in_place_t { 2576d0caaeSpatrick explicit in_place_t() = default; 2676d0caaeSpatrick }; 27*4bdff4beSrobert inline constexpr in_place_t in_place{}; 2876d0caaeSpatrick 2976d0caaeSpatrick template <class _Tp> 3076d0caaeSpatrick struct _LIBCPP_TEMPLATE_VIS in_place_type_t { 3176d0caaeSpatrick explicit in_place_type_t() = default; 3276d0caaeSpatrick }; 3376d0caaeSpatrick template <class _Tp> 34*4bdff4beSrobert inline constexpr in_place_type_t<_Tp> in_place_type{}; 3576d0caaeSpatrick 3676d0caaeSpatrick template <size_t _Idx> 3776d0caaeSpatrick struct _LIBCPP_TEMPLATE_VIS in_place_index_t { 3876d0caaeSpatrick explicit in_place_index_t() = default; 3976d0caaeSpatrick }; 4076d0caaeSpatrick template <size_t _Idx> 41*4bdff4beSrobert inline constexpr in_place_index_t<_Idx> in_place_index{}; 4276d0caaeSpatrick 4376d0caaeSpatrick template <class _Tp> struct __is_inplace_type_imp : false_type {}; 4476d0caaeSpatrick template <class _Tp> struct __is_inplace_type_imp<in_place_type_t<_Tp>> : true_type {}; 4576d0caaeSpatrick 4676d0caaeSpatrick template <class _Tp> 47*4bdff4beSrobert using __is_inplace_type = __is_inplace_type_imp<__remove_cvref_t<_Tp>>; 4876d0caaeSpatrick 4976d0caaeSpatrick template <class _Tp> struct __is_inplace_index_imp : false_type {}; 5076d0caaeSpatrick template <size_t _Idx> struct __is_inplace_index_imp<in_place_index_t<_Idx>> : true_type {}; 5176d0caaeSpatrick 5276d0caaeSpatrick template <class _Tp> 53*4bdff4beSrobert using __is_inplace_index = __is_inplace_index_imp<__remove_cvref_t<_Tp>>; 5476d0caaeSpatrick 5576d0caaeSpatrick #endif // _LIBCPP_STD_VER > 14 5676d0caaeSpatrick 5776d0caaeSpatrick _LIBCPP_END_NAMESPACE_STD 5876d0caaeSpatrick 5976d0caaeSpatrick #endif // _LIBCPP___UTILITY_IN_PLACE_H 60