libstdc++-v3/testsuite/21_strings/basic_string/cons/wchar_t/moveable2.cc

   1 // { dg-options "-std=gnu++11 -fno-inline" }
   2 // { dg-require-string-conversions "" }
   3
   4 // Copyright (C) 2011-2015 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // NOTE: This makes use of the fact that we know how moveable
  22 // is implemented on string (via swap). If the implementation changed
  23 // this test may begin to fail.
  24
  25 #include <string>
  26 #include <utility>
  27 #include <testsuite_hooks.h>
  28
  29 class twstring : public std::basic_string<wchar_t>
  30 {
  31 public:
  32   twstring() : std::basic_string<wchar_t>() {}
  33   twstring(twstring&& s) : std::basic_string<wchar_t>(std::move(s)) {}
  34   twstring& operator=(twstring&&) = default;
  35 };
  36
  37 void test01()
  38 {
  39   bool test __attribute__((unused)) = true;
  40
  41   twstring a, b;
  42   a.push_back(L'1');
  43   b = std::move(a);
  44   VERIFY( b.size() == 1 && b[0] == L'1' && a.size() == 0 );
  45
  46   twstring c(std::move(b));
  47   VERIFY( c.size() == 1 && c[0] == L'1' );
  48   VERIFY( b.size() == 0 );
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }