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POWhat is the simplest way to create and call dynamically a class method in C++?
 

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  1. POWhat is the simplest way to create and call dynamically a class method in C++?
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    <p>I want to fill a map with class name and method, a unique identifier and a pointer to the method.</p> <pre><code>typedef std::map&lt;std::string, std::string, std::string, int&gt; actions_type; typedef actions_type::iterator actions_iterator; actions_type actions; actions.insert(make_pair(class_name, attribute_name, identifier, method_pointer)); //after which I want call the appropriate method in the loop while (the_app_is_running) { std::string requested_class = get_requested_class(); std::string requested_method = get_requested_method(); //determine class for(actions_iterator ita = actions.begin(); ita != actions.end(); ++ita) { if (ita-&gt;first == requested_class &amp;&amp; ita-&gt;second == requested_method) { //class and method match //create a new class instance //call method } } } </code></pre> <p>If the method is static then a simple pointer is enough and the problem is simple, but I want to dynamically create the object so I need to store a pointer to class and an offset for the method and I don't know if this works (if the offset is always the same etc).</p> <p>The problem is that C++ lacks reflection, the equivalent code in a interpreted language with reflection should look like this (example in PHP):</p> <pre><code>$actions = array ( "first_identifier" =&gt; array("Class1","method1"), "second_identifier" =&gt; array("Class2","method2"), "third_identifier" =&gt; array("Class3","method3") ); while ($the_app_is_running) { $id = get_identifier(); foreach($actions as $identifier =&gt; $action) { if ($id == $identifier) { $className = $action[0]; $methodName = $action[1]; $object = new $className() ; $method = new ReflectionMethod($className , $methodName); $method -&gt; invoke($object); } } } </code></pre> <p>PS: Yes I'm trying to make a (web) MVC front controller in C++. I know I know why don't use PHP, Ruby, Python (insert your favorite web language here) etc?, I just want C++.</p>
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    1. COtry not to force c++ to be a dynamic language. Use a base class and virtual functions, and think about the interfaces you want to call.
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    2. COyeah, what you are looking for isn't easily achievable without some work behind the doors
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      1. USJohannes Schaub - litb
 

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