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Diffstat (limited to 'libcxx/include/__memory/swap_allocator.h')
-rw-r--r-- | libcxx/include/__memory/swap_allocator.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libcxx/include/__memory/swap_allocator.h b/libcxx/include/__memory/swap_allocator.h new file mode 100644 index 000000000000..64970fa9e2f4 --- /dev/null +++ b/libcxx/include/__memory/swap_allocator.h @@ -0,0 +1,53 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___MEMORY_SWAP_ALLOCATOR_H +#define _LIBCPP___MEMORY_SWAP_ALLOCATOR_H + +#include <__config> +#include <__memory/allocator_traits.h> +#include <__type_traits/integral_constant.h> +#include <__utility/swap.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <typename _Alloc> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2, true_type) +#if _LIBCPP_STD_VER > 11 + _NOEXCEPT +#else + _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) +#endif +{ + using _VSTD::swap; + swap(__a1, __a2); +} + +template <typename _Alloc> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void +__swap_allocator(_Alloc&, _Alloc&, false_type) _NOEXCEPT {} + +template <typename _Alloc> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2) +#if _LIBCPP_STD_VER > 11 + _NOEXCEPT +#else + _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) +#endif +{ + _VSTD::__swap_allocator( + __a1, __a2, integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>()); +} + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___MEMORY_SWAP_ALLOCATOR_H |