xref: /freebsd/contrib/llvm-project/libcxx/include/__type_traits/is_array.h (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583)
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_ARRAY_H
10 #define _LIBCPP___TYPE_TRAITS_IS_ARRAY_H
11 
12 #include <__config>
13 #include <__type_traits/integral_constant.h>
14 #include <cstddef>
15 
16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17 #  pragma GCC system_header
18 #endif
19 
20 _LIBCPP_BEGIN_NAMESPACE_STD
21 
22 #if __has_builtin(__is_array) &&                                                                                       \
23     (!defined(_LIBCPP_COMPILER_CLANG_BASED) || (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1900))
24 
25 template <class _Tp>
26 struct _LIBCPP_TEMPLATE_VIS is_array : _BoolConstant<__is_array(_Tp)> {};
27 
28 #  if _LIBCPP_STD_VER >= 17
29 template <class _Tp>
30 inline constexpr bool is_array_v = __is_array(_Tp);
31 #  endif
32 
33 #else
34 
35 template <class _Tp>
36 struct _LIBCPP_TEMPLATE_VIS is_array : public false_type {};
37 template <class _Tp>
38 struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[]> : public true_type {};
39 template <class _Tp, size_t _Np>
40 struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[_Np]> : public true_type {};
41 
42 #  if _LIBCPP_STD_VER >= 17
43 template <class _Tp>
44 inline constexpr bool is_array_v = is_array<_Tp>::value;
45 #  endif
46 
47 #endif // __has_builtin(__is_array)
48 
49 _LIBCPP_END_NAMESPACE_STD
50 
51 #endif // _LIBCPP___TYPE_TRAITS_IS_ARRAY_H
52