| //===----------------------------------------------------------------------===// |
| // |
| // 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_SCALAR_H |
| #define _LIBCPP___TYPE_TRAITS_IS_SCALAR_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/is_arithmetic.h> |
| #include <__type_traits/is_enum.h> |
| #include <__type_traits/is_member_pointer.h> |
| #include <__type_traits/is_pointer.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // In C++03 nullptr_t is library-provided but must still count as "scalar." |
| #if __has_keyword(__is_scalar) && !defined(_LIBCPP_CXX03_LANG) |
| |
| template<class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_scalar : _BoolConstant<__is_scalar(_Tp)> { }; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_scalar_v = __is_scalar(_Tp); |
| #endif |
| |
| #else // __has_keyword(__is_scalar) |
| |
| template <class _Tp> struct __is_block : false_type {}; |
| #if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) |
| template <class _Rp, class ..._Args> struct __is_block<_Rp (^)(_Args...)> : true_type {}; |
| #endif |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_scalar |
| : public integral_constant<bool, is_arithmetic<_Tp>::value || |
| is_member_pointer<_Tp>::value || |
| is_pointer<_Tp>::value || |
| __is_nullptr_t<_Tp>::value || |
| __is_block<_Tp>::value || |
| is_enum<_Tp>::value > {}; |
| |
| template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
| #endif |
| |
| #endif // __has_keyword(__is_scalar) |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_SCALAR_H |
