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17e0686ab1
`__has_cpp_attribute(__nodiscard__)` is always true now, so we might as well replace `_LIBCPP_NODISCARD`. It's one less macro that can result in bad diagnostics.
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H
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#define _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H
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#include <__config>
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#include <__memory/allocator_traits.h>
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#include <cstddef>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 23
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template <class _Alloc>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto __allocate_at_least(_Alloc& __alloc, size_t __n) {
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return std::allocator_traits<_Alloc>::allocate_at_least(__alloc, __n);
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}
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#else
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template <class _Pointer>
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struct __allocation_result {
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_Pointer ptr;
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size_t count;
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};
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template <class _Alloc>
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[[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI
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_LIBCPP_CONSTEXPR __allocation_result<typename allocator_traits<_Alloc>::pointer>
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__allocate_at_least(_Alloc& __alloc, size_t __n) {
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return {__alloc.allocate(__n), __n};
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}
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#endif // _LIBCPP_STD_VER >= 23
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H
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