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change to gathering of posn info

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svn: r15538
This commit is contained in:
John Clements 2009-07-23 04:36:36 +00:00
parent a8473f08ff
commit a08acb6aad
1 changed files with 12 additions and 9 deletions
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21
collects/stepper/private/model.ss
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@ -222,9 +222,7 @@
mark-list returned-value-list render-settings)
#f))
(r:step-was-app? mark-list)
(make-posn-info
(syntax-position (mark-source (car mark-list)))
(syntax-span (mark-source (car mark-list)))))))]
(mark-list->posn-info mark-list))))]
[(result-exp-break result-value-break)
(let ([reconstruct
@ -278,9 +276,7 @@
(make-before-after-result
left-exps right-exps step-kind
held-posn-info
(make-posn-info
(syntax-position (mark-source (car mark-list)))
(syntax-span (mark-source (car mark-list)))))))]))]
(mark-list->posn-info mark-list))))]))]
[(double-break)
;; a double-break occurs at the beginning of a let's
@ -296,9 +292,7 @@
(maybe-lift (car reconstruct-result) #f))]
[right-side (map (lambda (exp) (unwind exp render-settings))
(maybe-lift (cadr reconstruct-result) #t))])
(let ([posn-info (make-posn-info
(syntax-position (mark-source (car mark-list)))
(syntax-span (mark-source (car mark-list))))])
(let ([posn-info (mark-list->posn-info mark-list)])
(receive-result
(make-before-after-result
(append new-finished-list left-side)
@ -366,3 +360,12 @@
; skipped-step is used to indicate that the "before" step was skipped.
(define-struct skipped-step ())
(define the-skipped-step (make-skipped-step))
;; produce a posn-info structure based on the information in a mark-list
(define (mark-list->posn-info mark-list)
(let* ([first-mark-source (mark-source (car mark-list))]
[posn (syntax-position first-mark-source)]
[span (syntax-span first-mark-source)])
(unless posn
(error 'mark-list->posn-info "expected a syntax object with a syntax-position, got: ~v" (syntax->datum first-mark-source)))
(make-posn-info posn span)))