libcxx/test/std/utilities/utility/pairs/pairs.spec/make_pair.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 // <utility>
  10
  11 // template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&);
  12
  13 #include <utility>
  14 #include <memory>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18
  19 int main(int, char**)
  20 {
  21     {
  22         typedef std::pair<int, short> P1;
  23         P1 p1 = std::make_pair(3, static_cast<short>(4));
  24         assert(p1.first == 3);
  25         assert(p1.second == 4);
  26     }
  27
  28 #if TEST_STD_VER >= 11
  29     {
  30         typedef std::pair<std::unique_ptr<int>, short> P1;
  31         P1 p1 = std::make_pair(std::unique_ptr<int>(new int(3)), static_cast<short>(4));
  32         assert(*p1.first == 3);
  33         assert(p1.second == 4);
  34     }
  35     {
  36         typedef std::pair<std::unique_ptr<int>, short> P1;
  37         P1 p1 = std::make_pair(nullptr, static_cast<short>(4));
  38         assert(p1.first == nullptr);
  39         assert(p1.second == 4);
  40     }
  41 #endif
  42 #if TEST_STD_VER >= 14
  43     {
  44         typedef std::pair<int, short> P1;
  45         constexpr P1 p1 = std::make_pair(3, static_cast<short>(4));
  46         static_assert(p1.first == 3, "");
  47         static_assert(p1.second == 4, "");
  48     }
  49 #endif
  50
  51
  52   return 0;
  53 }