63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
// Ordered slots hello world example for Boost.Signals2
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// Copyright Douglas Gregor 2001-2004.
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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 <iostream>
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#include <boost/signals2/signal.hpp>
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struct Hello
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{
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void operator()() const
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{
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std::cout << "Hello";
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}
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};
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struct World
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{
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void operator()() const
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{
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std::cout << ", World!" << std::endl;
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}
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};
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//[ good_morning_def_code_snippet
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struct GoodMorning
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{
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void operator()() const
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{
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std::cout << "... and good morning!" << std::endl;
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}
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};
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//]
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int main()
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{
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//[ hello_world_ordered_code_snippet
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boost::signals2::signal<void ()> sig;
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sig.connect(1, World()); // connect with group 1
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sig.connect(0, Hello()); // connect with group 0
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//]
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//[ hello_world_ordered_invoke_code_snippet
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// by default slots are connected at the end of the slot list
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sig.connect(GoodMorning());
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// slots are invoked this order:
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// 1) ungrouped slots connected with boost::signals2::at_front
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// 2) grouped slots according to ordering of their groups
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// 3) ungrouped slots connected with boost::signals2::at_back
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sig();
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//]
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return 0;
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}
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