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Re: Lifting all buffer restrictions in indentation functions


From: Stefan Monnier
Subject: Re: Lifting all buffer restrictions in indentation functions
Date: Sat, 09 Dec 2017 10:19:06 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

> It _is_ hypothetical.  The question that bothers me is specifically
> whether we should flatly disallow those hypothetical cases, just
> because we "cannot imagine" them.

They can still call indent-line-function, and the extra work that
indent-according-to-mode does isn't that much, so if it's *really*
indispensable to do "all that indent-according-to-mode does except
widen", then you can do it with something like

    (let* ((ilf indent-line-function)
           (res (list (point-min) (point-max)))
           (indent-line-function
            (lambda (&rest args)
              (apply #'narrow-to-region res)
              (apply ilf args))))
      (indent-according-to-mode))


-- Stefan




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