// ------------------------------------------------------------------------
// Abstract Containers
// A. Fischer   June 10, 2001                             file: contain.hpp
// ------------------------------------------------------------------------
#pragma once

#include "item.hpp"

template <class T>
class Container {
  public:           // -----------------------------------------------------
    virtual void            put(T*)  =0; // Put T into the Container.
    virtual T*  pop()                =0; // Remove next T from Container.
    virtual T*  peek()               =0; // Look but don't remove next T.
    virtual ostream& print(ostream&) =0; // Print all Ts in Container.
};