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-definition module Figure
-
-/** Example library to demonstrate the use of Existential Types.
-    The library implements a simple set of drawing objects.
-    
-    Author:  Peter Achten
-    Version: April 14 2008
-*/
-import StdPicture
-
-::  Figure
-
-//  drawFigure f creates a window in which f is displayed
-drawFigure      ::          Figure -> *World -> *World
-
-//  convenient lifting operations on the methods of a figure to the figure self
-move            :: Vector2  Figure -> Figure
-
-//  Specialized Figure constructor functions:
-//  mkFigures figs combines all figs in left-to-right order
-mkFigures       :: [Figure]      -> Figure
-
-//  line a b draws a line from a to b
-line            :: Point2 Point2 -> Figure
-
-//  rectangle a b forms a rectangle with diagonal-points a and b
-rectangle       :: Point2 Point2 -> Figure
-
-//  ellips a b forms an ellips that fits in the rectangle with diagonal-points a and b
-ellips          :: Point2 Point2 -> Figure
-
-//  text t a shows a text t with left-top corner at a
-text            :: String Point2 -> Figure