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

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2011-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // NOTE: This makes use of the fact that we know how moveable
  21 // is implemented on string (via swap). If the implementation changed
  22 // this test may begin to fail.
  23
  24 #include <string>
  25 #include <utility>
  26 #include <testsuite_hooks.h>
  27
  28 class tstring : public std::basic_string<wchar_t>
  29 {
  30 public:
  31   tstring() : std::basic_string<wchar_t>() {}
  32   tstring(tstring&& s) : std::basic_string<wchar_t>(std::move(s)) {}
  33   tstring& operator=(tstring&& s) = default;
  34 };
  35
  36 void test01()
  37 {
  38   tstring a, b;
  39   a.push_back(L'1');
  40   b = std::move(a);
  41   VERIFY( b.size() == 1 && b[0] == L'1' && a.size() == 0 );
  42
  43   tstring c(std::move(b));
  44   VERIFY( c.size() == 1 && c[0] == L'1' );
  45 #if ! _GLIBCXX_FULLY_DYNAMIC_STRING
  46   VERIFY( b.size() == 0 ); // not guaranteed by the standard
  47 #endif
  48 }
  49
  50 int main()
  51 {
  52   test01();
  53   return 0;
  54 }