43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
// Example program for connecting an extended slot,
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// using a signal's connect_extended and extended_slot_type.
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//
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// Copyright Frank Mori Hess 2009.
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//
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// Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org
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#include <boost/signals2/signal.hpp>
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#include <iostream>
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#include <string>
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namespace bs2 = boost::signals2;
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void single_shot_slot(const bs2::connection &conn, const std::string &message)
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{
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conn.disconnect();
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std::cout << message;
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}
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int main()
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{
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typedef bs2::signal<void (void)> sig_type;
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sig_type sig;
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{
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sig_type::extended_slot_type hello(&single_shot_slot, _1, "Hello");
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sig.connect_extended(hello);
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}
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sig(); // prints "Hello"
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{
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sig_type::extended_slot_type world(&single_shot_slot, _1, ", World!\n");
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sig.connect_extended(world);
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}
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sig(); // only prints ", World!\n" since hello slot has disconnected itself
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sig(); // prints nothing, world slot has disconnected itself
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return 0;
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}
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