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| 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 <__type_traits/is_swappable.h> |
| 16 | #include <__utility/swap.h> |
| 17 | |
| 18 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 19 | # pragma GCC system_header |
| 20 | #endif |
| 21 | |
| 22 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 23 | |
| 24 | template <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 >= 14 |
| 27 | _NOEXCEPT |
| 28 | #else |
| 29 | _NOEXCEPT_(__is_nothrow_swappable_v<_Alloc>) |
| 30 | #endif |
| 31 | { |
| 32 | using std::swap; |
| 33 | swap(__a1, __a2); |
| 34 | } |
| 35 | |
| 36 | template <typename _Alloc> |
| 37 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void |
| 38 | __swap_allocator(_Alloc&, _Alloc&, false_type) _NOEXCEPT {} |
| 39 | |
| 40 | template <typename _Alloc> |
| 41 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swap_allocator(_Alloc& __a1, _Alloc& __a2) |
| 42 | #if _LIBCPP_STD_VER >= 14 |
| 43 | _NOEXCEPT |
| 44 | #else |
| 45 | _NOEXCEPT_(__is_nothrow_swappable_v<_Alloc>) |
| 46 | #endif |
| 47 | { |
| 48 | std::__swap_allocator( |
| 49 | __a1, __a2, integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>()); |
| 50 | } |
| 51 | |
| 52 | _LIBCPP_END_NAMESPACE_STD |
| 53 | |
| 54 | #endif // _LIBCPP___MEMORY_SWAP_ALLOCATOR_H |
| 55 |
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