suzanne.soy/compatibility
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Fix regexp-match/fail-without-reading -- don't fail if some subpattern didn't

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match so its info was #f instead of a pair.

original commit: 79c4f331d9e9c801a7e09023543fcd12ba537c74
This commit is contained in:
Eli Barzilay 2003-12-01 17:26:34 +00:00
parent 98ae6cb185
commit 5bd7d3925b
1 changed files with 4 additions and 4 deletions
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8
collects/mzlib/string.ss
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@ -137,13 +137,13 @@
(let ([m (regexp-match-peek-positions pattern input-port start-k end-k)])
(and m
;; What happens if someone swipes our chars before we can get them?
(begin
(let ([drop (caar m)])
;; drop prefix before match:
(read-string (caar m) input-port)
(let ([s (read-string (- (cdar m) (caar m)) input-port)])
(read-string drop input-port)
(let ([s (read-string (- (cdar m) drop) input-port)])
(cons s
(map (lambda (p)
(substring s (- (car p) (caar m)) (- (cdr p) (caar m))))
(and p (substring s (- (car p) drop) (- (cdr p) drop))))
(cdr m)))))))))
;; Helper function for the regexp functions below.