126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
// { dg-do run { target c++14 } }
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// Copyright (C) 2013-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <experimental/optional>
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#include <testsuite_hooks.h>
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struct tracker
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{
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tracker(int value) : value(value) { ++count; }
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~tracker() { --count; }
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tracker(tracker const& other) : value(other.value) { ++count; }
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tracker(tracker&& other) : value(other.value)
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{
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other.value = -1;
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++count;
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}
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tracker& operator=(tracker const&) = default;
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tracker& operator=(tracker&&) = default;
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int value;
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static int count;
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};
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int tracker::count = 0;
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struct exception { };
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struct throwing_move
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{
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throwing_move() = default;
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throwing_move(throwing_move const&) { throw exception {}; }
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};
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int main()
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{
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// [20.5.4.1] Constructors
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{
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std::experimental::optional<long> o;
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auto moved_to = std::move(o);
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VERIFY( !moved_to );
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VERIFY( !o );
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}
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{
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const long val = 0x1234ABCD;
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std::experimental::optional<long> o { std::experimental::in_place, val};
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auto moved_to = std::move(o);
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VERIFY( moved_to );
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VERIFY( *moved_to == val );
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VERIFY( o && *o == val );
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}
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{
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std::experimental::optional<tracker> o;
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auto moved_to = std::move(o);
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VERIFY( !moved_to );
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VERIFY( tracker::count == 0 );
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VERIFY( !o );
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}
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{
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std::experimental::optional<tracker> o { std::experimental::in_place, 333 };
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auto moved_to = std::move(o);
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VERIFY( moved_to );
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VERIFY( moved_to->value == 333 );
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VERIFY( tracker::count == 2 );
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VERIFY( o && o->value == -1 );
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}
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enum outcome { nothrow, caught, bad_catch };
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{
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outcome result = nothrow;
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std::experimental::optional<throwing_move> o;
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try
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{
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auto moved_to = std::move(o);
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}
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catch(exception const&)
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{ result = caught; }
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catch(...)
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{ result = bad_catch; }
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VERIFY( result == nothrow );
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}
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{
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outcome result = nothrow;
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std::experimental::optional<throwing_move> o { std::experimental::in_place };
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try
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{
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auto moved_to = std::move(o);
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}
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catch(exception const&)
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{ result = caught; }
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catch(...)
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{ result = bad_catch; }
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VERIFY( result == caught );
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}
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VERIFY( tracker::count == 0 );
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}
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