minimart-2014/minimart/examples/example.rkt

35 lines
898 B
Racket

#lang racket/base
(require racket/match)
(require (only-in racket/port read-line-evt))
(require "../core.rkt")
(require "../ground.rkt")
(define (r e s)
(match e
[(message body _ _) (transition s (send `(got ,body) #:meta-level 1))]
[_ #f]))
(define (b e n)
(match e
[#f (if (< n 10)
(transition (+ n 1) (send `(hello ,n)))
#f)]
[_ #f]))
(define (spy e s)
(when e (log-info "SPY: ~v" e))
#f)
(define (echoer e s)
(match e
[(message (event _ (list (? eof-object?))) _ _) (transition s (quit))]
[(message (event _ (list line)) _ _) (transition s (send `(got-line ,line)))]
[_ #f]))
(run-ground (spawn-world (spawn r (void) (list (sub ?)))
(spawn b 0))
(spawn echoer (void) (list (sub (event (read-line-evt (current-input-port) 'any) ?)
#:meta-level 1)))
(spawn spy (void) (list (sub ? #:level 1000) (pub ? #:level 1000))))