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POTemplate polymorphism
 

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    <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 &lt;iostream&gt; using std::cin; using std::cout; using std::endl; template&lt;class T&gt; class Queue { public: Queue(); Queue(T*); } class Com { public: virtual void setReady() { cout &lt;&lt; "Com" &lt;&lt; endl; } }; class DerivedCom : public Com { public: void setReady() { cout &lt;&lt; "DCom" &lt;&lt; endl; } }; class Derived2Com : public Com { public: void setReady() { cout &lt;&lt; "D2Com" &lt;&lt; endl; } }; class BaseClass { protected: Com* com; Queue&lt;BaseClass&gt;* queue; public: BaseClass(Com* c = new Com, Queue&lt;BaseClass&gt;* q = new Queue&lt;BaseClass&gt;) : com(c), queue(q) { } void setReady() { com-&gt;setReady(); } }; class DerivedClass : public BaseClass { public: DerivedClass() : BaseClass(new DerivedCom, new Queue&lt;DerivedClass&gt;) { } }; class Derived2Class : public BaseClass { public: Derived2Class() : BaseClass(new Derived2Com, new Queue&lt;Derived2Class&gt;) {} }; int main() { BaseClass* base = new Derived2Class(); base-&gt;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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    1. COIf this is just simple mistake that `*` is missing before `q` in `BaseClass(Com* c = new Com, Queue<BaseClass> q = new Queue<BaseClass>)` then correct it. But this will not solve your problems...
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