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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_CMP_H10#define _LIBCPP___UTILITY_CMP_H11 12#include <__config>13#include <__type_traits/integer_traits.h>14#include <__type_traits/is_signed.h>15#include <__type_traits/make_unsigned.h>16#include <limits>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_PUSH_MACROS23#include <__undef_macros>24 25_LIBCPP_BEGIN_NAMESPACE_STD26 27#if _LIBCPP_STD_VER >= 2028 29template <typename _Tp, typename _Ip>30concept __comparison_can_promote_to =31 sizeof(_Tp) < sizeof(_Ip) || (sizeof(_Tp) == sizeof(_Ip) && __signed_integer<_Tp>);32 33template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>34[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_equal(_Tp __t, _Up __u) noexcept {35 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)36 return __t == __u;37 else if constexpr (__comparison_can_promote_to<_Tp, int> && __comparison_can_promote_to<_Up, int>)38 return static_cast<int>(__t) == static_cast<int>(__u);39 else if constexpr (__comparison_can_promote_to<_Tp, long long> && __comparison_can_promote_to<_Up, long long>)40 return static_cast<long long>(__t) == static_cast<long long>(__u);41 else if constexpr (is_signed_v<_Tp>)42 return __t < 0 ? false : make_unsigned_t<_Tp>(__t) == __u;43 else44 return __u < 0 ? false : __t == make_unsigned_t<_Up>(__u);45}46 47template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>48[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_not_equal(_Tp __t, _Up __u) noexcept {49 return !std::cmp_equal(__t, __u);50}51 52template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>53[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less(_Tp __t, _Up __u) noexcept {54 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)55 return __t < __u;56 else if constexpr (__comparison_can_promote_to<_Tp, int> && __comparison_can_promote_to<_Up, int>)57 return static_cast<int>(__t) < static_cast<int>(__u);58 else if constexpr (__comparison_can_promote_to<_Tp, long long> && __comparison_can_promote_to<_Up, long long>)59 return static_cast<long long>(__t) < static_cast<long long>(__u);60 else if constexpr (is_signed_v<_Tp>)61 return __t < 0 ? true : make_unsigned_t<_Tp>(__t) < __u;62 else63 return __u < 0 ? false : __t < make_unsigned_t<_Up>(__u);64}65 66template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>67[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater(_Tp __t, _Up __u) noexcept {68 return std::cmp_less(__u, __t);69}70 71template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>72[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less_equal(_Tp __t, _Up __u) noexcept {73 return !std::cmp_greater(__t, __u);74}75 76template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>77[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater_equal(_Tp __t, _Up __u) noexcept {78 return !std::cmp_less(__t, __u);79}80 81template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _Up>82[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool in_range(_Up __u) noexcept {83 return std::cmp_less_equal(__u, numeric_limits<_Tp>::max()) &&84 std::cmp_greater_equal(__u, numeric_limits<_Tp>::min());85}86 87#endif // _LIBCPP_STD_VER >= 2088 89_LIBCPP_END_NAMESPACE_STD90 91_LIBCPP_POP_MACROS92 93#endif // _LIBCPP___UTILITY_CMP_H94