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Re: does emacs regular expression support (?!expression)
From: |
Tim Landscheidt |
Subject: |
Re: does emacs regular expression support (?!expression) |
Date: |
Thu, 02 Feb 2012 21:14:40 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) |
Tassilo Horn <tassilo@member.fsf.org> wrote:
>> does emacs regular expression support (?!expression) ?
> It would be more helpful if you'd tell us what (?!expression) would
> match, preferably with some examples. Syntactically, emacs regexp's shy
> groups look similar. The regular expression
> "\\(:?foo\\|bar\\)\\([0-9]+\\)"
> matches "foo19" or "bar23", but doesn't capture foo or bar, so that
> (match-string 1) is the number.
In Perl, "(?!pattern)" is a zero-width negative look-ahead
assertion. Emacs does not support these AFAIK.
Tim
- does emacs regular expression support (?!expression), 土星五号, 2012/02/02
- Re: does emacs regular expression support (?!expression), Tassilo Horn, 2012/02/02
- Re: does emacs regular expression support (?!expression),
Tim Landscheidt <=
- Re: does emacs regular expression support (?!expression), Kevin Rodgers, 2012/02/02
- Re: does emacs regular expression support (?!expression), 土星五号, 2012/02/02
- Re: does emacs regular expression support (?!expression), Thien-Thi Nguyen, 2012/02/03
- Re: does emacs regular expression support (?!expression), Tim Landscheidt, 2012/02/03
- Re: does emacs regular expression support (?!expression), Thien-Thi Nguyen, 2012/02/03
- Re: does emacs regular expression support (?!expression), Tim Landscheidt, 2012/02/04
- Re: does emacs regular expression support (?!expression), 土星五号, 2012/02/04