gdb/unittests/optional/cons/default.cc

   1 // Copyright (C) 2013-2021 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 namespace cons_default {
  19
  20 struct tracker
  21 {
  22   tracker() { ++count; }
  23   ~tracker() { --count; }
  24
  25   tracker(tracker const&) { ++count; }
  26   tracker(tracker&&) { ++count; }
  27
  28   tracker& operator=(tracker const&) = default;
  29   tracker& operator=(tracker&&) = default;
  30
  31   static int count;
  32 };
  33
  34 int tracker::count = 0;
  35
  36 static void
  37 test ()
  38 {
  39   // [20.5.4.1] Constructors
  40
  41   {
  42     gdb::optional<tracker> o;
  43     VERIFY( !o );
  44   }
  45
  46   {
  47     gdb::optional<tracker> o {};
  48     VERIFY( !o );
  49   }
  50
  51   {
  52     gdb::optional<tracker> o = {};
  53     VERIFY( !o );
  54   }
  55
  56   VERIFY( tracker::count == 0 );
  57 }
  58
  59 } // namespace cons_default