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// { dg-do run { target c++14 } }
// Copyright (C) 2013-2018 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/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
struct tracker
{
tracker(int value) : value(value) { ++count; }
~tracker() { --count; }
tracker(tracker const& other) : value(other.value) { ++count; }
tracker(tracker&& other) : value(other.value)
{
other.value = -1;
++count;
}
tracker& operator=(tracker const&) = default;
tracker& operator=(tracker&&) = default;
int value;
static int count;
};
int tracker::count = 0;
struct exception { };
struct throwing_move
{
throwing_move() = default;
throwing_move(throwing_move const&) { throw exception {}; }
};
int main()
{
// [20.5.4.1] Constructors
{
std::experimental::optional<long> o;
auto moved_to = std::move(o);
VERIFY( !moved_to );
VERIFY( !o );
}
{
const long val = 0x1234ABCD;
std::experimental::optional<long> o { std::experimental::in_place, val};
auto moved_to = std::move(o);
VERIFY( moved_to );
VERIFY( *moved_to == val );
VERIFY( o && *o == val );
}
{
std::experimental::optional<tracker> o;
auto moved_to = std::move(o);
VERIFY( !moved_to );
VERIFY( tracker::count == 0 );
VERIFY( !o );
}
{
std::experimental::optional<tracker> o { std::experimental::in_place, 333 };
auto moved_to = std::move(o);
VERIFY( moved_to );
VERIFY( moved_to->value == 333 );
VERIFY( tracker::count == 2 );
VERIFY( o && o->value == -1 );
}
enum outcome { nothrow, caught, bad_catch };
{
outcome result = nothrow;
std::experimental::optional<throwing_move> o;
try
{
auto moved_to = std::move(o);
}
catch(exception const&)
{ result = caught; }
catch(...)
{ result = bad_catch; }
VERIFY( result == nothrow );
}
{
outcome result = nothrow;
std::experimental::optional<throwing_move> o { std::experimental::in_place };
try
{
auto moved_to = std::move(o);
}
catch(exception const&)
{ result = caught; }
catch(...)
{ result = bad_catch; }
VERIFY( result == caught );
}
VERIFY( tracker::count == 0 );
}
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