1e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 2e78f53d1SNikolas Klauser // 3e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 5e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e78f53d1SNikolas Klauser // 7e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 8e78f53d1SNikolas Klauser 9*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___UTILITY_IS_VALID_RANGE_H 10*ce777190SNikolas Klauser #define _LIBCPP___CXX03___UTILITY_IS_VALID_RANGE_H 11e78f53d1SNikolas Klauser 1273fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp.h> 1373fbae83SNikolas Klauser #include <__cxx03/__config> 1473fbae83SNikolas Klauser #include <__cxx03/__type_traits/is_constant_evaluated.h> 15e78f53d1SNikolas Klauser 16e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17e78f53d1SNikolas Klauser # pragma GCC system_header 18e78f53d1SNikolas Klauser #endif 19e78f53d1SNikolas Klauser 20e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 21e78f53d1SNikolas Klauser 22e78f53d1SNikolas Klauser template <class _Tp> 23e78f53d1SNikolas Klauser _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_SANITIZE("address") bool 24e78f53d1SNikolas Klauser __is_valid_range(const _Tp* __first, const _Tp* __last) { 25e78f53d1SNikolas Klauser if (__libcpp_is_constant_evaluated()) { 26e78f53d1SNikolas Klauser // If this is not a constant during constant evaluation, that is because __first and __last are not 27e78f53d1SNikolas Klauser // part of the same allocation. If they are part of the same allocation, we must still make sure they 28e78f53d1SNikolas Klauser // are ordered properly. 29e78f53d1SNikolas Klauser return __builtin_constant_p(__first <= __last) && __first <= __last; 30e78f53d1SNikolas Klauser } 31e78f53d1SNikolas Klauser 32e78f53d1SNikolas Klauser return !__less<>()(__last, __first); 33e78f53d1SNikolas Klauser } 34e78f53d1SNikolas Klauser 35e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 36e78f53d1SNikolas Klauser 37*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___UTILITY_IS_VALID_RANGE_H 38