libstdc++-v3/testsuite/23_containers/stack/members/emplace_cxx17_return.cc

   1 // Copyright (C) 2016-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++17" }
  19 // { dg-do run { target c++17 } }
  20
  21 #include <stack>
  22 #include <testsuite_hooks.h>
  23
  24 using test_type = std::stack<int>;
  25
  26 void
  27 test01()
  28 {
  29   test_type x{ test_type::container_type{1, 2, 3, 4} };
  30   test_type::reference r = x.emplace(5);
  31   VERIFY( r == 5 );
  32   VERIFY( &r == &x.top() );
  33 }
  34
  35 int
  36 main()
  37 {
  38   test01();
  39 }