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/*
* Copyright 2023, The libsigc++ Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sigc++/scoped_connection.h>
#include <utility>
namespace sigc
{
// All we are doing is assigning weak_raw_ptr, which is noexcept, so declare it.
// connectionʼs copy operators can be noexcept for that reason, if breaking ABI.
scoped_connection::scoped_connection(connection c) noexcept
: conn_(std::move(c))
{
}
scoped_connection&
scoped_connection::operator=(connection c)
{
conn_.disconnect();
conn_ = std::move(c);
return *this;
}
// We do not implement move-ctor in terms of move-assign, so we can be noexcept,
// as we do not need to call the maybe-throwing disconnect() for obvious reason.
scoped_connection::scoped_connection(scoped_connection&& sc) noexcept
: conn_(std::exchange(sc.conn_, connection()))
{
}
scoped_connection&
scoped_connection::operator=(scoped_connection&& sc)
{
conn_.disconnect();
conn_ = std::exchange(sc.conn_, connection());
return *this;
}
scoped_connection::~scoped_connection()
{
conn_.disconnect();
}
bool
scoped_connection::empty() const noexcept
{
return conn_.empty();
}
bool
scoped_connection::connected() const noexcept
{
return conn_.connected();
}
bool
scoped_connection::blocked() const noexcept
{
return conn_.blocked();
}
bool
scoped_connection::block(bool should_block) noexcept
{
return conn_.block(should_block);
}
bool
scoped_connection::unblock() noexcept
{
return conn_.unblock();
}
void
scoped_connection::disconnect()
{
conn_.disconnect();
}
scoped_connection::operator bool() const noexcept
{
return conn_.operator bool();
}
// Swapping can be noexcept, as it does not need to disconnect either connection
// because they will still stay alive, just in opposite instances post-swapping.
void
swap(scoped_connection& sca, scoped_connection& scb) noexcept
{
using std::swap;
swap(sca.conn_, scb.conn_);
}
connection
scoped_connection::release() noexcept
{
return std::exchange(conn_, connection());
}
} /* namespace sigc */
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