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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___MEMORY_SWAP_ALLOCATOR_H 10 #define _LIBCPP___MEMORY_SWAP_ALLOCATOR_H 11 12 #include <__config> 13 #include <__memory/allocator_traits.h> 14 #include <__type_traits/integral_constant.h> 15 #include <__utility/swap.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <typename _Alloc> 24 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2, true_type) 25 #if _LIBCPP_STD_VER > 11 26 _NOEXCEPT 27 #else 28 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 29 #endif 30 { 31 using _VSTD::swap; 32 swap(__a1, __a2); 33 } 34 35 template <typename _Alloc> 36 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void 37 __swap_allocator(_Alloc&, _Alloc&, false_type) _NOEXCEPT {} 38 39 template <typename _Alloc> 40 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2) 41 #if _LIBCPP_STD_VER > 11 42 _NOEXCEPT 43 #else 44 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 45 #endif 46 { 47 _VSTD::__swap_allocator( 48 __a1, __a2, integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 49 } 50 51 _LIBCPP_END_NAMESPACE_STD 52 53 #endif // _LIBCPP___MEMORY_SWAP_ALLOCATOR_H 54