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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___UTILITY_CMP_H 10 #define _LIBCPP___UTILITY_CMP_H 11 12 #include <__config> 13 #include <__type_traits/disjunction.h> 14 #include <__type_traits/is_integral.h> 15 #include <__type_traits/is_same.h> 16 #include <__type_traits/is_signed.h> 17 #include <__type_traits/make_unsigned.h> 18 #include <__utility/forward.h> 19 #include <__utility/move.h> 20 #include <limits> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 _LIBCPP_PUSH_MACROS 27 #include <__undef_macros> 28 29 _LIBCPP_BEGIN_NAMESPACE_STD 30 31 #if _LIBCPP_STD_VER >= 20 32 template <class _Tp, class... _Up> 33 struct _IsSameAsAny : _Or<_IsSame<_Tp, _Up>...> {}; 34 35 template <class _Tp> 36 concept __is_safe_integral_cmp = 37 is_integral_v<_Tp> && 38 !_IsSameAsAny<_Tp, 39 bool, 40 char, 41 char16_t, 42 char32_t 43 # ifndef _LIBCPP_HAS_NO_CHAR8_T 44 , 45 char8_t 46 # endif 47 # ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 48 , 49 wchar_t 50 # endif 51 >::value; 52 53 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 54 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_equal(_Tp __t, _Up __u) noexcept { 55 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>) 56 return __t == __u; 57 else if constexpr (is_signed_v<_Tp>) 58 return __t < 0 ? false : make_unsigned_t<_Tp>(__t) == __u; 59 else 60 return __u < 0 ? false : __t == make_unsigned_t<_Up>(__u); 61 } 62 63 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 64 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_not_equal(_Tp __t, _Up __u) noexcept { 65 return !std::cmp_equal(__t, __u); 66 } 67 68 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 69 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less(_Tp __t, _Up __u) noexcept { 70 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>) 71 return __t < __u; 72 else if constexpr (is_signed_v<_Tp>) 73 return __t < 0 ? true : make_unsigned_t<_Tp>(__t) < __u; 74 else 75 return __u < 0 ? false : __t < make_unsigned_t<_Up>(__u); 76 } 77 78 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 79 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater(_Tp __t, _Up __u) noexcept { 80 return std::cmp_less(__u, __t); 81 } 82 83 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 84 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less_equal(_Tp __t, _Up __u) noexcept { 85 return !std::cmp_greater(__t, __u); 86 } 87 88 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 89 _LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater_equal(_Tp __t, _Up __u) noexcept { 90 return !std::cmp_less(__t, __u); 91 } 92 93 template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 94 _LIBCPP_HIDE_FROM_ABI constexpr bool in_range(_Up __u) noexcept { 95 return std::cmp_less_equal(__u, numeric_limits<_Tp>::max()) && 96 std::cmp_greater_equal(__u, numeric_limits<_Tp>::min()); 97 } 98 #endif // _LIBCPP_STD_VER >= 20 99 100 _LIBCPP_END_NAMESPACE_STD 101 102 _LIBCPP_POP_MACROS 103 104 #endif // _LIBCPP___UTILITY_CMP_H 105