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From: "Lennart Borgman (gmail)" <lennart.borgman@gmail.com>
To: emacs-pretest-bug@gnu.org
Subject: Should not * be greedy in a regexp?
Date: Sat, 03 Nov 2007 18:58:03 +0100	[thread overview]
Message-ID: <472CB6AB.9020301@gmail.com> (raw)

Starting from

    emacs -Q

Put this in the *scratch* buffer and eval it:

(let* ((mod-regx+ "\\(\\(?:[CSM]-\\)+\\)")
        (mod-regx* "\\(\\(?:[CSM]-\\)*\\)")
        (str "<C-S-tab>")
        (m+ (when (string-match mod-regx+ str)
              (match-string 0 str)))
        (m* (when (string-match mod-regx* str)
              (match-string 0 str))))
   (lwarn 't :warning "m+=%s, m*=%s" m+ m*))

I get

   Warning (t): m+=C-S-, m*=

Should not both this regexp give the same result here? It looks to me 
like * is treated as *? - ie non-greedy.


In GNU Emacs 22.1.50.1 (i386-mingw-nt5.1.2600)
  of 2007-07-04
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/g/include'

             reply	other threads:[~2007-11-03 17:58 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-03 17:58 Lennart Borgman (gmail) [this message]
2007-11-03 18:48 ` Should not * be greedy in a regexp? Andreas Schwab
2007-11-03 18:54   ` Andreas Schwab
2007-11-03 19:12     ` Lennart Borgman (gmail)
2007-11-04  1:55 ` Stefan Monnier

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