(include stdint.h)

(struct vec2
  ((uint32_t x)
   (uint32_t y)))

(trait gui
  (fn void update ((float dt)))
  (fn void render ())
  (fn vec2 get-position ())
  (fn void add-child ((gui *w))))

(struct button
  ((vector gui) children)
  ((vec2 pos)))

(impl gui button
  (fn void update ((float dt))
    ())
  (fn void render ()
    ())
  (fn vec2 get-position ()
    (return self->pos))
  (fn void add-child ((gui *w))
    (push self->children w)))