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

   1 // { dg-options "-fno-inline" }
   2 // { dg-do run { target c++11 } }
   3 // { dg-require-string-conversions "" }
   4
   5 // Copyright (C) 2011-2022 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // NOTE: This makes use of the fact that we know how moveable
  23 // is implemented on string (via swap). If the implementation changed
  24 // this test may begin to fail.
  25
  26 #include <string>
  27 #include <utility>
  28 #include <testsuite_hooks.h>
  29
  30 class twstring : public std::basic_string<wchar_t>
  31 {
  32 public:
  33   twstring() : std::basic_string<wchar_t>() {}
  34   twstring(twstring&& s) : std::basic_string<wchar_t>(std::move(s)) {}
  35   twstring& operator=(twstring&&) = default;
  36 };
  37
  38 void test01()
  39 {
  40   twstring a, b;
  41   a.push_back(L'1');
  42   b = std::move(a);
  43   VERIFY( b.size() == 1 && b[0] == L'1' && a.size() == 0 );
  44
  45   twstring c(std::move(b));
  46   VERIFY( c.size() == 1 && c[0] == L'1' );
  47 #if ! _GLIBCXX_FULLY_DYNAMIC_STRING
  48   VERIFY( b.size() == 0 ); // not guaranteed by the standard
  49 #endif
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }