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    <p>In your example you could remove the new and delete by removing the <code>callback</code> class. This is just a Decorator on <code>callable_from_object</code> and <code>callable_from_object</code> that provides some syntactic sugar: automatically choosing the correct callable object to delegate to.</p> <p>However this sugar is nice and you will probably want to keep it. Also you will probably have to place the objects other callable objects on the heap anyway.</p> <p>To me the bigger question is why are you creating a callback library? If it is just to practice c++ then that is fine, but there are loads of exaples of these already:</p> <ul> <li><a href="http://www.boost.org/doc/html/function.html" rel="nofollow noreferrer">boost::function</a></li> <li><a href="http://www.boost.org/doc/html/signals.html" rel="nofollow noreferrer">boost::singnal and slots</a></li> <li><a href="http://doc.trolltech.com/signalsandslots.html" rel="nofollow noreferrer">QT signal and slots</a></li> </ul> <p>Why not use one these?</p> <p>From looking at your example if you keep on the path you are going your solution will converge towards boost::function without its flexibility. So why not use it? While I don't beleive that the boost developers are Gods they are very tallented engineers with an excellent peer review process that results in very stong libraries. I don't think most individuals or organisations can reinvent better libraries.</p> <p>If your concern is excessive memeory allocation and deallocation the solution is this case would probably be a custom allocator for the various callable subtypes. But again I prefer to allow other people to research these tecniques and use their libraries.</p>
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    1. POCallback in C++, template member? (2)
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    1. COI do not agree with your first paragraph. And when you say "why not use one of these", my answer to you is: why not explain to me how?
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      1. USGiovanni Funchal
    2. COhttp://stackoverflow.com/questions/1284239/callback-in-c-template-member-2/1284374#1284374
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      1. USGiovanni Funchal
 

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