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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___MEMORY_TEMPORARY_BUFFER_H11#define _LIBCPP___MEMORY_TEMPORARY_BUFFER_H12 13#include <__config>14#include <__cstddef/ptrdiff_t.h>15#include <__memory/unique_temporary_buffer.h>16#include <__utility/pair.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TEMPORARY_BUFFER)23 24_LIBCPP_BEGIN_NAMESPACE_STD25 26template <class _Tp>27[[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_CFI _LIBCPP_DEPRECATED_IN_CXX17 pair<_Tp*, ptrdiff_t>28get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT {29 __unique_temporary_buffer<_Tp> __unique_buf = std::__allocate_unique_temporary_buffer<_Tp>(__n);30 pair<_Tp*, ptrdiff_t> __result(__unique_buf.get(), __unique_buf.get_deleter().__count_);31 __unique_buf.release();32 return __result;33}34 35template <class _Tp>36inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_IN_CXX17 void return_temporary_buffer(_Tp* __p) _NOEXCEPT {37 __unique_temporary_buffer<_Tp> __unique_buf(__p);38 (void)__unique_buf;39}40 41_LIBCPP_END_NAMESPACE_STD42 43#endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TEMPORARY_BUFFER)44 45#endif // _LIBCPP___MEMORY_TEMPORARY_BUFFER_H46