c-plus-plus-dafuq/sfml-const/fix2.hpp

#pragma once

class Drawable;

class RenderTarget {
  public:
    void draw(const Drawable& drawable);
};

class Drawable {
  public:
    /*
     * NOTE: This requires const because RenderTarget
     * pass itself in as a *this which is always const.
     * If you need to draw without const then invert it
     * then use shape.render_to(target) instead.
     */
    virtual void draw(RenderTarget& target) const = 0;

    virtual void render_to(RenderTarget& target) = 0;
};

class Shape : public Drawable {
  public:
  void draw(RenderTarget& target) const override;
  void render_to(RenderTarget &target) override;
};