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check that we did not have any skipped values in wrap-evaluator

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svn: r5449
This commit is contained in:
Eli Barzilay 2007-01-24 19:01:41 +00:00
parent 7c253a2dcf
commit 952a50906c
1 changed files with 8 additions and 5 deletions
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13
collects/handin-server/checker.ss
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@ -329,15 +329,18 @@
(if cur (append! cur new) (thread-cell-set! added-lines new))))
(define ((wrap-evaluator eval) expr)
(define unknown "unknown")
(define (reraise exn)
(raise
(let-values ([(struct-type skipped?) (struct-info exn)])
(if (and struct-type (not skipped?))
(let ([vals (vector->list (struct->vector exn))])
(apply (struct-type-make-constructor struct-type)
(string->immutable-string
(format "while evaluating ~s:\n ~a" expr (cadr vals)))
(cddr vals)))
(let ([vals (cdr (vector->list (struct->vector exn unknown)))])
(if (memq unknown vals)
exn
(apply (struct-type-make-constructor struct-type)
(string->immutable-string
(format "while evaluating ~s:\n ~a" expr (car vals)))
(cdr vals))))
exn))))
(with-handlers ([exn? reraise]) (eval expr)))