**menu button class:**

#ifndef __FORGE_MENU_BUTTON_HPP__
#define __FORGE_MENU_BUTTON_HPP__

#include "ForgeConstruct.hpp"
#include "ForgeConstructFactory.hpp"

class ForgeMenuButton : public ForgeSDLConstruct {

public:
ForgeMenuButton() : ForgeSDLConstruct() {}

  virtual void load(const ForgeConstructParams*);
.
.  more code in here but removed conciseness
.

};

**class ForgeMenuButtonCreator : public ForgeBaseCreator{
    ForgeConstruct* createForgeConstruct() const {
    return new ForgeMenuButton();**
  }
};


**base class**

class ForgeBaseCreator{

  public:
        virtual ForgeConstruct* createForgeCosntruct() const = 0;
        virtual ~ForgeBaseCreator(){}
};

Inheriting and defining

class ForgeMenuButtonCreator : public ForgeBaseCreator{
    ForgeConstruct* createForgeConstruct() const {
    return new ForgeMenuButton();
  }
};

calling from Game loop .cpp

ForgeConstructFactory::Instance()->registerType(“MenuButton”, new ForgeMenuButtonCreator());

the Error is with ForgeMenuButtonCreator() – > error allocating object of an abstract class.

compile error with clang :

unimplemented pure virtual method ‘createForgeCosntruct’ in ‘ForgeMenuButtonCreator’
virtual ForgeConstruct* createForgeCosntruct() const = 0;

It is defined is it not ? Not sure what else to do ?