| //===----------------------------------------------------------------------===// |
| // |
| // 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___TYPE_TRAITS_IS_UNSIGNED_H |
| #define _LIBCPP___TYPE_TRAITS_IS_UNSIGNED_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/is_arithmetic.h> |
| #include <__type_traits/is_integral.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if __has_builtin(__is_unsigned) |
| |
| template<class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_unsigned : _BoolConstant<__is_unsigned(_Tp)> { }; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_unsigned_v = __is_unsigned(_Tp); |
| #endif |
| |
| #else // __has_builtin(__is_unsigned) |
| |
| template <class _Tp, bool = is_integral<_Tp>::value> |
| struct __libcpp_is_unsigned_impl : public _BoolConstant<(_Tp(0) < _Tp(-1))> {}; |
| |
| template <class _Tp> |
| struct __libcpp_is_unsigned_impl<_Tp, false> : public false_type {}; // floating point |
| |
| template <class _Tp, bool = is_arithmetic<_Tp>::value> |
| struct __libcpp_is_unsigned : public __libcpp_is_unsigned_impl<_Tp> {}; |
| |
| template <class _Tp> struct __libcpp_is_unsigned<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unsigned : public __libcpp_is_unsigned<_Tp> {}; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; |
| #endif |
| |
| #endif // __has_builtin(__is_unsigned) |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_UNSIGNED_H |