Peter Brett wrote:
Chris Dennis <cgden...@btinternet.com> writes:Hello Guile People Is there a way to make Guile regular expressions less greedy? I understand that POSIX doesn't define non-greedy modifiers. Specifically, I'm trying to parse font names such as Arial 12 Arial Bold Italic 14 Nimbus Sans L Bold Italic Condensed 11 so that I can construct CSS styles from them. I've tried the following, but the first (.*) gobbles up everything before the size because the other elements are optional: (define s (string-match "(.*)( +(bold|semi-bold|regular|light))?( +(italic|oblique))?( +(condensed))? +([0-9]+)" "nimbus sans l bold italic condensed 11")) Are there other ways of doing this?Does this work for you? (define (parsefont str) (let ((match (string-match "( +(bold|semi-bold|regular|light))?( +(italic|oblique))?( +(condensed))? +([0-9]+)" str))) (cons (match:prefix match) (map (lambda (n) (match:substring match n)) '(2 4 6 7))))) (parsefont "nimbus sans l bold italic condensed 11") ==> ("nimbus sans l" "bold" "italic" "condensed" "11") HTH, Peter
Brilliant! I was just about to give up on regular expressions and write some tedious string-manipulation code. That works perfectly. Thank you very much.
(That code will now become part of GnuCash). cheers Chris -- Chris Dennis cgden...@btinternet.com Fordingbridge, Hampshire, UK
