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_FUNDAMENTAL_H
10 #define _LIBCPP___TYPE_TRAITS_IS_FUNDAMENTAL_H
11 
12 #include <__config>
13 #include <__type_traits/integral_constant.h>
14 #include <__type_traits/is_null_pointer.h>
15 #include <__type_traits/is_void.h>
16 
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 #  pragma GCC system_header
19 #endif
20 
21 _LIBCPP_BEGIN_NAMESPACE_STD
22 
23 #if __has_builtin(__is_fundamental)
24 
25 template <class _Tp>
26 struct _LIBCPP_TEMPLATE_VIS is_fundamental : _BoolConstant<__is_fundamental(_Tp)> {};
27 
28 #  if _LIBCPP_STD_VER >= 17
29 template <class _Tp>
30 inline constexpr bool is_fundamental_v = __is_fundamental(_Tp);
31 #  endif
32 
33 #else // __has_builtin(__is_fundamental)
34 
35 template <class _Tp>
36 struct _LIBCPP_TEMPLATE_VIS is_fundamental
37     : public integral_constant<bool, is_void<_Tp>::value || __is_nullptr_t<_Tp>::value || is_arithmetic<_Tp>::value> {};
38 
39 #  if _LIBCPP_STD_VER >= 17
40 template <class _Tp>
41 inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
42 #  endif
43 
44 #endif // __has_builtin(__is_fundamental)
45 
46 _LIBCPP_END_NAMESPACE_STD
47 
48 #endif // _LIBCPP___TYPE_TRAITS_IS_FUNDAMENTAL_H
49