libcxx/test/std/containers/sequences/array/array.tuple/get_const.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 // template <size_t I, class T, size_t N> const T& get(const array<T, N>& a);
  12
  13 #include <array>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17
  18 TEST_CONSTEXPR_CXX14 bool tests()
  19 {
  20     {
  21         std::array<double, 1> const array = {3.3};
  22         assert(std::get<0>(array) == 3.3);
  23     }
  24     {
  25         std::array<double, 2> const array = {3.3, 4.4};
  26         assert(std::get<0>(array) == 3.3);
  27         assert(std::get<1>(array) == 4.4);
  28     }
  29     {
  30         std::array<double, 3> const array = {3.3, 4.4, 5.5};
  31         assert(std::get<0>(array) == 3.3);
  32         assert(std::get<1>(array) == 4.4);
  33         assert(std::get<2>(array) == 5.5);
  34     }
  35     {
  36         std::array<double, 1> const array = {3.3};
  37         static_assert(std::is_same<double const&, decltype(std::get<0>(array))>::value, "");
  38     }
  39
  40     return true;
  41 }
  42
  43 int main(int, char**)
  44 {
  45     tests();
  46 #if TEST_STD_VER >= 14
  47     static_assert(tests(), "");
  48 #endif
  49     return 0;
  50 }