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Re: Negative occur
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From: |
Ted Zlatanov |
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Subject: |
Re: Negative occur |
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Date: |
Wed, 28 Nov 2007 12:54:23 -0600 |
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User-agent: |
Gnus/5.110007 (No Gnus v0.7) Emacs/22.1 (gnu/linux) |
On Wed, 28 Nov 2007 09:03:17 -0800 "Drew Adams" <drew.adams@oracle.com> wrote:
DA> On Wed, 28 Nov 2007 11:21:43 +0100 David Kastrup <dak@gnu.org> wrote:
>> > You could try running "occur" with the pattern "^" (which matches
>> > every line), then prune the results with M-x delete-matching-lines RET
DA> I realize that your suggestion is that this be added to Emacs. I agree.
DA> FYI - In Icicles, just do this: C-' foobar C-~
DA> That shows and lets you visit all lines that do not match the regexp
DA> "foobar". `C-'' is `icicle-occur'. `C-~' complements the current set of
DA> matches.
Both solutions will be slower on a large buffer than they should be. A
real inversion parameter, either as a predicate function or a variable,
passed lexically or as a parameter to the occur-engine function call, is
necessary. A predicate function is probably best as it can express
transformations more complex than identity and negation.
Ted