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37 lines
1.3 KiB
C++
37 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___UTILITY_IS_VALID_RANGE_H
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#define _LIBCPP___UTILITY_IS_VALID_RANGE_H
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#include <__algorithm/comp.h>
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#include <__config>
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#include <__type_traits/is_constant_evaluated.h>
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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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template <class _Tp>
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_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_SANITIZE("address") bool
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__is_valid_range(const _Tp* __first, const _Tp* __last) {
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if (__libcpp_is_constant_evaluated()) {
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// If this is not a constant during constant evaluation, that is because __first and __last are not
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// part of the same allocation. If they are part of the same allocation, we must still make sure they
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// are ordered properly.
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return __builtin_constant_p(__first <= __last) && __first <= __last;
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}
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return !__less<>()(__last, __first);
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___UTILITY_IS_VALID_RANGE_H
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