see also lexi-lambda/racket-2htdp-typed
(require typed/big-bang)
This does not provide a drop in replacement for big-bang from 2htdp/universe.
Instead of a macro, it provides a function, which has keyword arguments for #:on-tick, #:to-draw, etc.
You also have to provide a world? predicate, and use (inst big-bang World).
An example world program:
#lang typed/racket
(require typed/big-bang
typed/2htdp/image)
(define-type World Integer)
(: main : [World -> World])
(define (main t)
((inst big-bang World)
t
exact-integer?
#:on-tick add1
#:to-draw render
#:stop-when (λ ([t : Integer]) (<= 10000 t))
#:on-key (λ ([t : Integer] [key : KeyEvent])
(cond [(key=? key "+") (+ 1000 t)]
[else t]))
#:on-release (λ ([t : Integer] [key : KeyEvent])
(- t 100))
#:on-mouse (λ ([t : Integer] [x : Integer] [y : Integer] [me : MouseEvent])
(- t 2))
))
(: render : [World -> Image])
(define (render t)
(overlay (text (number->string t) 36 "black")
(empty-scene 200 200)))
(main 0)
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