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From: jpkotta <jpkotta@gmail.com>
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Subject: Re: does emacs support incremental searching for partial matches?
Date: Fri, 25 Feb 2011 19:22:34 -0800 (PST)
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On Feb 24, 8:43=A0am, Stefan Monnier <monn...@iro.umontreal.ca> wrote:
> >> (defconst my-isearch-re "[^\n\s\t]*?")
> > or (defconst my-isearch-re "\\S *?")
> > I'm not sure which is clearer.
>
> Many languages set \n to have syntax "close comment" rather than
> "space", in which case \S- does not exclude \n.
>
> =A0 =A0 =A0 =A0 Stefan

I just added http://www.emacswiki.org/emacs/FlexIsearch to the wiki.
It's something that I've been thinking about for a while, but I didn't
know how to hook into isearch.  I think it's very close to what the OP
wanted.