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Improve parse-section-in-parentheses 

Recognize "foo(3scm)." in addition to "foo(3scm),"
This commit is contained in:
Lassi Kortela 2023-02-25 11:02:25 +02:00
parent 9e85f4bd92
commit f1bfc3c9ce
1 changed files with 11 additions and 6 deletions
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17
scm/html/man.scm
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@ -162,16 +162,21 @@
(format #f "<a href=\"~a\">~a</a>" url body)))
(define (parse-section-in-parentheses str)
(define (is i choices)
(let ((char (string-ref str i)))
(let loop ((k 0))
(and (< k (string-length choices))
(or (char=? char (string-ref choices k))
(loop (+ k 1)))))))
(let* ((n (string-length str))
(r (and (>= n 3)
(char=? #\( (string-ref str 0))
(char<=? #\1 (string-ref str 1))
(char<=? (string-ref str 1) #\9)
(cond ((char=? #\) (string-ref str (- n 1)))
(is 0 "(")
(is 1 "123456789")
(cond ((is (- n 1) ")")
1)
((and (>= n 4)
(char=? #\) (string-ref str (- n 2)))
(char=? #\, (string-ref str (- n 1))))
(is (- n 2) ")")
(is (- n 1) ",."))
2)
(else
#f)))))