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Re: Regex is not being as "hungry" as it is supposed to


From: Andreas Röhler
Subject: Re: Regex is not being as "hungry" as it is supposed to
Date: Fri, 06 Aug 2010 08:29:37 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6

Am 06.08.2010 06:04, schrieb Deniz Dogan:
2010/8/6 suvayu ali<address@hidden>:
Hi everyone,

I have a strange problem, recently some of my regexps started becoming
less "hungry" than usual. For example I have a file like this,

  #1 153030 120 = 423988
  #2 152845 181 = 1500234
  #3 155160 247 = 767821
  #4 155160 310 = 11131347
  #5 155160 319 = 13979167

I wanted to remove the 3rd column of numbers along with the = sign. So
I called `query-replace-regexp' with this regexp replacement,

`[0-9]+ = ->'

But this matches the numbers like this,

120 =
1 =
7 =
0 =
9 =

where as I am expecting it to be this,

120 =
181 =
247 =
310 =
319 =

This is just one instance, I have faced similar other cases. I get the
proper expected match only for the first match, for the subsequent
matches the regexp becomes less "hungry".

Is this a consequence of some conflicting settings or a possible bug?
I see this behaviour with GNU Emacs 24.0.50.1, emacs-snapshot from an
Ubuntu Lucid ppa and emacs compiled from source on Fedora 12. (but the
settings are identical for both these setups)

Thanks in advance for any comments/hints about this issue. :)

--
Suvayu

Open source is the future. It sets us free.



That's weird, it happens to me to on:
GNU Emacs 24.0.50.1 (i386-mingw-nt6.1.7600) of 2010-07-12 on 3249CTO

I noticed two things when tinkering around with this problem.

1. M-x re-builder correctly highlights the portions we both expect.
2. It's only the *highlighting* in query-replace-regexp that
    fails. When performing the actual replacing, it works just as
    expected.

I'm sensing that this is a bug of some sort and you should report it.


same at

GNU Emacs 23.1.92.1 (i686-pc-linux-gnu, GTK+ Version 2.12.0) of 2010-02-19

replacement works as desribed, just the highlighting fails.





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