You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23 lines
826 B
Racket
23 lines
826 B
Racket
8 years ago
|
#lang br
|
||
|
|
(require "line.rkt" "structs.rkt")
|
||
|
|
(provide run)
|
||
|
|
|
||
|
|
(define (run line-table)
|
||
|
|
(define line-vec
|
||
|
|
(list->vector (sort (hash-keys line-table) <)))
|
||
|
|
(with-handlers ([end-program-signal? (λ (exn-val) (void))])
|
||
|
|
(for/fold ([line-idx 0])
|
||
|
|
([i (in-naturals)]
|
||
|
|
#:break (>= line-idx (vector-length line-vec)))
|
||
|
|
(define line-num (vector-ref line-vec line-idx))
|
||
|
|
(define line-func (hash-ref line-table line-num))
|
||
|
|
(with-handlers
|
||
|
|
([change-line-signal?
|
||
|
|
(λ (cls)
|
||
|
|
(define clsv (change-line-signal-val cls))
|
||
|
|
(or
|
||
|
|
(and (exact-positive-integer? clsv)
|
||
|
|
(vector-member clsv line-vec))
|
||
|
|
(line-func #:error (format "line ~a not found" clsv))))])
|
||
|
|
(line-func)
|
||
|
|
(add1 line-idx)))))
|