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Re: Can't figure out how to create a tabulated-list-mode with visible
From: |
Michael Heerdegen |
Subject: |
Re: Can't figure out how to create a tabulated-list-mode with visible |
Date: |
Wed, 12 Oct 2016 11:28:28 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
Stefan Huchler <stefan.huchler@mail.de> writes:
> Well I guess I misread the description. Each has the form, so the
> additional parenthesis makes sense, but why is a ' needed for entries
> but not for format?
Good question! One might assume that () and [] are quite symmetric, but
there are important differences.
Lisp programs are written as lists (and not as vectors). If you want a
list constant (at a position that is evaluated), you need to quote the
list to prevent evaluation, otherwise it would be interpreted as code.
OTOH, the syntax for vectors, [element...], is only used to describe
vectors. Vectors are self-evaluating objects, so you don't need to
quote. It wouldn't harm OTOH, but I guess it would look quite strange
to most people.
Regards,
Michael.