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POTemplate polymorphism
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copied!<p>I've recently received a <a href="https://stackoverflow.com/questions/13454756/c-polymorphic-object-members">very good answer as how to overload specific class members</a> by deriving classes.</p> <p>The issue now is that one of the members is in fact templated with specializations either being <code>BaseClass</code>, <code>DerivedClass</code> or <code>Derived2Class</code></p> <pre><code>#include <iostream> using std::cin; using std::cout; using std::endl; template<class T> class Queue { public: Queue(); Queue(T*); } class Com { public: virtual void setReady() { cout << "Com" << endl; } }; class DerivedCom : public Com { public: void setReady() { cout << "DCom" << endl; } }; class Derived2Com : public Com { public: void setReady() { cout << "D2Com" << endl; } }; class BaseClass { protected: Com* com; Queue<BaseClass>* queue; public: BaseClass(Com* c = new Com, Queue<BaseClass>* q = new Queue<BaseClass>) : com(c), queue(q) { } void setReady() { com->setReady(); } }; class DerivedClass : public BaseClass { public: DerivedClass() : BaseClass(new DerivedCom, new Queue<DerivedClass>) { } }; class Derived2Class : public BaseClass { public: Derived2Class() : BaseClass(new Derived2Com, new Queue<Derived2Class>) {} }; int main() { BaseClass* base = new Derived2Class(); base->setReady(); return 0; } </code></pre> <p>I can, without problem, "overload" simple classes like <code>Com</code>, <code>DerivedCom</code> and <code>Derived2Com</code> but the constructor signature of <code>BaseClass</code> won't fit to the type the deriving classes are trying to send it.</p>

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