resolving virtual class for Queue?

How does one go about resolving a virtual class so that the STL class queue will be able to instantiate?

Code:

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#include <queue>

  class Foo {
            virtual int run()  = 0;
  };

  int main() {
     
      queue<Foo> fooQueue;

  }

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I need the virtual class so that a user may implement their own class to pass in as a reference. Any ideas?

Thanks in advance.
Ken

Quote:

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Originally Posted by bean66

I need the virtual class so that a user may implement their own class to pass in as a reference. Any ideas?

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You can't instantiate an abstract virtual class. So why would you think you could store them in a container?

You need to store pointers, not objects. And that means object lifetimes need to be managed somehow.

Use a std::queue<Foo*> or std::queue<std::tr1::shared_ptr<Foo> > instead.

I'm obviously new to C++ and learning.

Thanks for your help.