libstdc++-v3/testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc

// { dg-do run { target c++17 } }

// Copyright (C) 2011-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// NOTE: This makes use of the fact that we know how moveable
// is implemented on string (via swap). If the implementation changed
// this test may begin to fail.

#include <string>
#include <utility>
#include <testsuite_hooks.h>

class tstring : public std::basic_string<wchar_t>
{
public:
  tstring() : std::basic_string<wchar_t>() {}
  tstring(tstring&& s) : std::basic_string<wchar_t>(std::move(s)) {}
  tstring& operator=(tstring&& s) = default;
};

void test01()
{
  tstring a, b;
  a.push_back(L'1');
  b = std::move(a);
  VERIFY( b.size() == 1 && b[0] == L'1' && a.size() == 0 );

  tstring c(std::move(b));
  VERIFY( c.size() == 1 && c[0] == L'1' );
#if ! _GLIBCXX_FULLY_DYNAMIC_STRING
  VERIFY( b.size() == 0 ); // not guaranteed by the standard
#endif
}

int main()
{
  test01();
  return 0;
}