55 lines · c
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___MEMORY_SWAP_ALLOCATOR_H10#define _LIBCPP___MEMORY_SWAP_ALLOCATOR_H11 12#include <__config>13#include <__memory/allocator_traits.h>14#include <__type_traits/integral_constant.h>15#include <__type_traits/is_swappable.h>16#include <__utility/swap.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 24template <typename _Alloc>25_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swap_allocator(_Alloc& __a1, _Alloc& __a2, true_type)26#if _LIBCPP_STD_VER >= 1427 _NOEXCEPT28#else29 _NOEXCEPT_(__is_nothrow_swappable_v<_Alloc>)30#endif31{32 using std::swap;33 swap(__a1, __a2);34}35 36template <typename _Alloc>37inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void38__swap_allocator(_Alloc&, _Alloc&, false_type) _NOEXCEPT {}39 40template <typename _Alloc>41inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swap_allocator(_Alloc& __a1, _Alloc& __a2)42#if _LIBCPP_STD_VER >= 1443 _NOEXCEPT44#else45 _NOEXCEPT_(__is_nothrow_swappable_v<_Alloc>)46#endif47{48 std::__swap_allocator(49 __a1, __a2, integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>());50}51 52_LIBCPP_END_NAMESPACE_STD53 54#endif // _LIBCPP___MEMORY_SWAP_ALLOCATOR_H55