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Re: empty-line-p
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From: |
Stefan Monnier |
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Subject: |
Re: empty-line-p |
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Date: |
Fri, 30 Mar 2007 01:36:00 -0400 |
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User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.95 (gnu/linux) |
> (if (looking-at "^[ \t\f\r]*$")
> t
> nil)))
(if <foo> t nil)
is an eta-regexp, which can be advantageously reduced to just <foo>.
Stefan
PS: The classical eta-regexp is (lambda (x) (<foo> x)), which is equivalent to
just <foo>. Another variant is (cons (car <foo>) (cdr <foo>)), which
eta-reduces to just <foo>.