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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___UTILITY_IS_VALID_RANGE_H10#define _LIBCPP___UTILITY_IS_VALID_RANGE_H11 12#include <__algorithm/comp.h>13#include <__config>14#include <__type_traits/is_constant_evaluated.h>15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)17# pragma GCC system_header18#endif19 20_LIBCPP_BEGIN_NAMESPACE_STD21 22template <class _Tp>23_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_SANITIZE("address") bool24__is_valid_range(const _Tp* __first, const _Tp* __last) {25 if (__libcpp_is_constant_evaluated()) {26 // If this is not a constant during constant evaluation, that is because __first and __last are not27 // part of the same allocation. If they are part of the same allocation, we must still make sure they28 // are ordered properly.29 return __builtin_constant_p(__first <= __last) && __first <= __last;30 }31 32 return !__less<>()(__last, __first);33}34 35_LIBCPP_END_NAMESPACE_STD36 37#endif // _LIBCPP___UTILITY_IS_VALID_RANGE_H38