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_RANK_H
10 #define _LIBCPP___TYPE_TRAITS_RANK_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 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank
23     : public integral_constant<size_t, 0> {};
24 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[]>
25     : public integral_constant<size_t, rank<_Tp>::value + 1> {};
26 template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[_Np]>
27     : public integral_constant<size_t, rank<_Tp>::value + 1> {};
28 
29 #if _LIBCPP_STD_VER > 14
30 template <class _Tp>
31 inline constexpr size_t rank_v = rank<_Tp>::value;
32 #endif
33 
34 _LIBCPP_END_NAMESPACE_STD
35 
36 #endif // _LIBCPP___TYPE_TRAITS_RANK_H
37