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Re: Problem with regexp nested groups

From: Phil Carmody
Subject: Re: Problem with regexp nested groups
Date: Sat, 10 May 2008 22:54:43 +0300
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)

Marc Tfardy <address@hidden> writes:
> Hallo,
> I have some problem with regexp and I hope someone could help me.
> Assume we have following text in a buffer.
> -- DATA ----------------------------------------------------------------
> <DATA="some/file/sample1.mp3">
> <DATA="some/file/sample2.mp3">
> blablalba
> <DATA="some/file/sample3.wav">
> blabla
> OBJ('some/file/sample4.mp3')
> OBJ('some/file/')
> ------------------------------------------------------------------------
> My goal is to extract some text from the buffer, namely only
> portion of text between `DATA="' and `"' or between `OBJ('' and
> `''. In both cases text must end with `.mp3' and the left and
> right delimeter shoud be ignored. 
> "\\(DATA=\"\\(.*?\.mp3\\)\"\\|OBJ('\\(.*?\.mp3\\)')\\)" nil t)

How about grouping /DATA="/ or /OBJ('/ as match 1, then capture
the filename as 2, and end with /.mp3"/ or /.mp3'/ as match 3?
That would match malformed lines such as 

but if that's a problem you can capture the quotes too and 
fix them in post-production.

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