libcxx/test/std/utilities/meta/meta.unary.prop.query/rank.pass.cpp

   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 // type_traits
  10
  11 // rank
  12
  13 #include <type_traits>
  14
  15 #include "test_macros.h"
  16
  17 template <class T, unsigned A>
  18 void test_rank()
  19 {
  20     static_assert( std::rank<T>::value == A, "");
  21     static_assert( std::rank<const T>::value == A, "");
  22     static_assert( std::rank<volatile T>::value == A, "");
  23     static_assert( std::rank<const volatile T>::value == A, "");
  24 #if TEST_STD_VER > 14
  25     static_assert( std::rank_v<T> == A, "");
  26     static_assert( std::rank_v<const T> == A, "");
  27     static_assert( std::rank_v<volatile T> == A, "");
  28     static_assert( std::rank_v<const volatile T> == A, "");
  29 #endif
  30 }
  31
  32 class Class
  33 {
  34 public:
  35     ~Class();
  36 };
  37
  38 int main(int, char**)
  39 {
  40     test_rank<void, 0>();
  41     test_rank<int&, 0>();
  42     test_rank<Class, 0>();
  43     test_rank<int*, 0>();
  44     test_rank<const int*, 0>();
  45     test_rank<int, 0>();
  46     test_rank<double, 0>();
  47     test_rank<bool, 0>();
  48     test_rank<unsigned, 0>();
  49
  50     test_rank<char[3], 1>();
  51     test_rank<char[][3], 2>();
  52     test_rank<char[][4][3], 3>();
  53
  54   return 0;
  55 }