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Re: About setf extensions
From: |
Stefan Monnier |
Subject: |
Re: About setf extensions |
Date: |
Fri, 15 Feb 2013 09:48:04 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
> Most of these have directly corresponding "set" functions, like
> `use-local-map' for `current-local-map', or `goto-char' for
> `point'. A few, like `point-min', expand to longer sequences of
> code when they are used with `setf' (`(narrow-to-region x
> (point-max))' in this case).
> I don't understand the `point-min' example. What does the "x" mean
> here?
(setf (point-min) x) gets turned into (narrow-to-region x (point-max)).
Stefan