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_pointer.h> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 #if __has_keyword(__is_scalar) 26 27 template<class _Tp> 28 struct _LIBCPP_TEMPLATE_VIS is_scalar : _BoolConstant<__is_scalar(_Tp)> { }; 29 30 #if _LIBCPP_STD_VER > 14 31 template <class _Tp> 32 inline constexpr bool is_scalar_v = __is_scalar(_Tp); 33 #endif 34 35 #else // __has_keyword(__is_scalar) 36 37 template <class _Tp> struct __is_block : false_type {}; 38 #if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) 39 template <class _Rp, class ..._Args> struct __is_block<_Rp (^)(_Args...)> : true_type {}; 40 #endif 41 42 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_scalar 43 : public integral_constant<bool, is_arithmetic<_Tp>::value || 44 is_member_pointer<_Tp>::value || 45 is_pointer<_Tp>::value || 46 __is_nullptr_t<_Tp>::value || 47 __is_block<_Tp>::value || 48 is_enum<_Tp>::value > {}; 49 50 template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; 51 52 #if _LIBCPP_STD_VER > 14 53 template <class _Tp> 54 inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; 55 #endif 56 57 #endif // __has_keyword(__is_scalar) 58 59 _LIBCPP_END_NAMESPACE_STD 60 61 #endif // _LIBCPP___TYPE_TRAITS_IS_SCALAR_H 62