libcxx/test/std/utilities/any/any.nonmembers/swap.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 // UNSUPPORTED: c++03, c++11, c++14
  10
  11 // <any>
  12
  13 // void swap(any &, any &) noexcept
  14
  15 // swap(...) just wraps any::swap(...). That function is tested elsewhere.
  16
  17 #include <any>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 int main(int, char**)
  23 {
  24
  25     { // test noexcept
  26         std::any a;
  27         static_assert(noexcept(swap(a, a)), "swap(any&, any&) must be noexcept");
  28     }
  29     {
  30         std::any a1 = 1;
  31         std::any a2 = 2;
  32
  33         swap(a1, a2);
  34
  35         assert(std::any_cast<int>(a1) == 2);
  36         assert(std::any_cast<int>(a2) == 1);
  37     }
  38
  39   return 0;
  40 }