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___TYPE_TRAITS_IS_SCALAR_H 10#define _LIBCPP___TYPE_TRAITS_IS_SCALAR_H 11 12#include <__config> 13#include <__type_traits/integral_constant.h> 14#include <__type_traits/is_arithmetic.h> 15#include <__type_traits/is_enum.h> 16#include <__type_traits/is_member_pointer.h> 17#include <__type_traits/is_null_pointer.h> 18#include <__type_traits/is_pointer.h> 19 20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21# pragma GCC system_header 22#endif 23 24_LIBCPP_BEGIN_NAMESPACE_STD 25 26#if __has_builtin(__is_scalar) 27 28template <class _Tp> 29struct _LIBCPP_TEMPLATE_VIS is_scalar : _BoolConstant<__is_scalar(_Tp)> {}; 30 31# if _LIBCPP_STD_VER >= 17 32template <class _Tp> 33inline constexpr bool is_scalar_v = __is_scalar(_Tp); 34# endif 35 36#else // __has_builtin(__is_scalar) 37 38template <class _Tp> 39struct __is_block : false_type {}; 40# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) 41template <class _Rp, class... _Args> 42struct __is_block<_Rp (^)(_Args...)> : true_type {}; 43# endif 44 45// clang-format off 46template <class _Tp> 47struct _LIBCPP_TEMPLATE_VIS is_scalar 48 : public integral_constant< 49 bool, is_arithmetic<_Tp>::value || 50 is_member_pointer<_Tp>::value || 51 is_pointer<_Tp>::value || 52 __is_nullptr_t<_Tp>::value || 53 __is_block<_Tp>::value || 54 is_enum<_Tp>::value> {}; 55// clang-format on 56 57template <> 58struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; 59 60# if _LIBCPP_STD_VER >= 17 61template <class _Tp> 62inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; 63# endif 64 65#endif // __has_builtin(__is_scalar) 66 67_LIBCPP_END_NAMESPACE_STD 68 69#endif // _LIBCPP___TYPE_TRAITS_IS_SCALAR_H 70