diff options
Diffstat (limited to 'libcxx/include/__utility/cmp.h')
| -rw-r--r-- | libcxx/include/__utility/cmp.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libcxx/include/__utility/cmp.h b/libcxx/include/__utility/cmp.h index 14dc0c1..68864e2 100644 --- a/libcxx/include/__utility/cmp.h +++ b/libcxx/include/__utility/cmp.h @@ -26,10 +26,18 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if _LIBCPP_STD_VER >= 20 +template <typename _Tp, typename _Ip> +concept __comparison_can_promote_to = + sizeof(_Tp) < sizeof(_Ip) || (sizeof(_Tp) == sizeof(_Ip) && __signed_integer<_Tp>); + template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _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 (__comparison_can_promote_to<_Tp, int> && __comparison_can_promote_to<_Up, int>) + return static_cast<int>(__t) == static_cast<int>(__u); + else if constexpr (__comparison_can_promote_to<_Tp, long long> && __comparison_can_promote_to<_Up, long long>) + return static_cast<long long>(__t) == static_cast<long long>(__u); else if constexpr (is_signed_v<_Tp>) return __t < 0 ? false : make_unsigned_t<_Tp>(__t) == __u; else @@ -45,6 +53,10 @@ template <__signed_or_unsigned_integer _Tp, __signed_or_unsigned_integer _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 (__comparison_can_promote_to<_Tp, int> && __comparison_can_promote_to<_Up, int>) + return static_cast<int>(__t) < static_cast<int>(__u); + else if constexpr (__comparison_can_promote_to<_Tp, long long> && __comparison_can_promote_to<_Up, long long>) + return static_cast<long long>(__t) < static_cast<long long>(__u); else if constexpr (is_signed_v<_Tp>) return __t < 0 ? true : make_unsigned_t<_Tp>(__t) < __u; else |