libcxx/test/std/containers/sequences/array/array.tuple/tuple_size.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 // <array>
  10
  11 // tuple_size<array<T, N> >::value
  12
  13 #include <array>
  14
  15 #include "test_macros.h"
  16
  17 template <class T, std::size_t N>
  18 void test()
  19 {
  20     {
  21     typedef std::array<T, N> C;
  22     static_assert((std::tuple_size<C>::value == N), "");
  23     }
  24     {
  25     typedef std::array<T const, N> C;
  26     static_assert((std::tuple_size<C>::value == N), "");
  27     }
  28     {
  29     typedef std::array<T volatile, N> C;
  30     static_assert((std::tuple_size<C>::value == N), "");
  31     }
  32     {
  33     typedef std::array<T const volatile, N> C;
  34     static_assert((std::tuple_size<C>::value == N), "");
  35     }
  36 }
  37
  38 int main(int, char**)
  39 {
  40     test<double, 0>();
  41     test<double, 3>();
  42     test<double, 5>();
  43
  44   return 0;
  45 }