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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___UTILITY_CMP_H
#define _LIBCPP___UTILITY_CMP_H
#include <__config>
#include <__type_traits/disjunction.h>
#include <__type_traits/is_integral.h>
#include <__type_traits/is_same.h>
#include <__type_traits/is_signed.h>
#include <__type_traits/make_unsigned.h>
#include <__utility/forward.h>
#include <__utility/move.h>
#include <limits>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 20
template <class _Tp, class... _Up>
struct _IsSameAsAny : _Or<_IsSame<_Tp, _Up>...> {};
template <class _Tp>
concept __is_safe_integral_cmp =
is_integral_v<_Tp> &&
!_IsSameAsAny<_Tp,
bool,
char,
char16_t,
char32_t
# ifndef _LIBCPP_HAS_NO_CHAR8_T
,
char8_t
# endif
# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
,
wchar_t
# endif
>::value;
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_equal(_Tp __t, _Up __u) noexcept {
if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)
return __t == __u;
else if constexpr (is_signed_v<_Tp>)
return __t < 0 ? false : make_unsigned_t<_Tp>(__t) == __u;
else
return __u < 0 ? false : __t == make_unsigned_t<_Up>(__u);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_not_equal(_Tp __t, _Up __u) noexcept {
return !std::cmp_equal(__t, __u);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less(_Tp __t, _Up __u) noexcept {
if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)
return __t < __u;
else if constexpr (is_signed_v<_Tp>)
return __t < 0 ? true : make_unsigned_t<_Tp>(__t) < __u;
else
return __u < 0 ? false : __t < make_unsigned_t<_Up>(__u);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater(_Tp __t, _Up __u) noexcept {
return std::cmp_less(__u, __t);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less_equal(_Tp __t, _Up __u) noexcept {
return !std::cmp_greater(__t, __u);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater_equal(_Tp __t, _Up __u) noexcept {
return !std::cmp_less(__t, __u);
}
template <__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
_LIBCPP_HIDE_FROM_ABI constexpr bool in_range(_Up __u) noexcept {
return std::cmp_less_equal(__u, numeric_limits<_Tp>::max()) &&
std::cmp_greater_equal(__u, numeric_limits<_Tp>::min());
}
#endif // _LIBCPP_STD_VER >= 20
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP___UTILITY_CMP_H
|
