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POAccessing a member function from another class without prior knowledge of the specific member function
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  1. POAccessing a member function from another class without prior knowledge of the specific member function
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    copied!<p>I want to create a class that will access the member functions of a family of classes. Going into more detail, I have class ControlChaos which is declared like this:</p> <pre><code>#define CALL_MEMBER_FN(object, ptrToMember) ((object)-&gt;*(ptrToMember)) typedef double (MultiMaps::*mapsGetPtr)(); typedef void (MultiMaps::*mapsSetPtr)(double para); class ControlChaos { public: ControlChaos(MultiMaps* _map, mat orbitPoints, colvec initCond, mapsGetPtr getPtr, mapsSetPtr setPtr, double deltaMax, double epsilonNeighborhood, int controlIterations, int maxIterations); /* Other stuff here. */ }; </code></pre> <p>with protected member variables which are of type mapsGetPtr and mapsSetPtr, and others. In the implementation, I use </p> <pre><code> CALL_MEMBER_FN(map,setPtr)(someParameter); </code></pre> <p>to call the function which I specified using a function pointer in the constructor of ControlChaos. The member functions I want to access are members of classes derived from MultiMaps. This code, by itself, compiles fine. When I try to instantiate a ControlChaos object with a function pointer pointing to a member function in a class derived from MultiMaps, then the compiler complains that I gave it the wrong argument type. </p> <p>Moreover, this <a href="http://www.codeproject.com/Articles/7150/Member-Function-Pointers-and-the-Fastest-Possible" rel="nofollow">article</a> seems to imply that a static cast could do the job, but I haven't found this to be true. </p> <p>Any ideas on how to solve this?</p>
 

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