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POHow to assign method member pointer of a subclass?
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  1. POHow to assign method member pointer of a subclass?
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    copied!<p>My problem is a bit complicated. I have one class (e: Component) which have Ports objects. When a Component create a Port object, it pass one of its methods to the Port constructor.</p> <p>Methods signatures :</p> <pre><code>typedef std::vector&lt;std::string&gt; (Component::*ComponentMethod)(std::vector&lt;std::string&gt;); </code></pre> <p>It works fine if I do :</p> <pre><code>// in class Component std::vector&lt;std::string&gt; Component::test_method( std::vector&lt;std::string&gt; ) { std::cout &lt;&lt; "Hello !\n"; // Do stuff } // Port ctor : Port( ComponentMethod callback ); Port* p = new Port(&amp;Component::test_method); </code></pre> <p>Well... now, my problem is that I make subclasses of class Component, and I don't know how to pass sublcasses methods to a Port.</p> <pre><code>// in class SubtypeComponent std::vector&lt;std::string&gt; SubtypeComponent::test_method2( std::vector&lt;std::string&gt; ) { std::cout &lt;&lt; "Hello !\n"; // Do stuff } // Port ctor : Port( ComponentMethod callback ); Port* p = new Port(&amp;SubtypeComponent::test_method2); // ERROR :'( </code></pre> <p>It seems normal : I guess the compiler expects precisely Component (only) method.</p> <p>--> I'm looking for a solution to "dynamically" assign methods in Ports (but I don't think this is possible)</p> <p>--> Maybe another solution should be usage of templates ? (defining "template methods pointers" instead of "Component methods pointers"), but I'm not sure.</p> <p>Any help would be appreciated :)</p>
 

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