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Re: Block comment syntax


From: Taylan Ulrich Bayirli/Kammer
Subject: Re: Block comment syntax
Date: Wed, 06 Aug 2014 09:28:11 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

David Michael <address@hidden> writes:

> Hi,
>
> The block comment documentation[1] claims that the closing "!#" must
> appear on its own line, but this doesn't actually seem to be the
> case[2].  For example, the line "(display #! comment !# 1)"
> successfully outputs "1".
>
> Can anyone clarify whether the documentation needs to be updated, or
> if the currently acceptable syntax is unintentional and should be
> avoided?
>
> Thanks.
>
> David
>
> [1] 
> http://git.savannah.gnu.org/gitweb/?p=guile.git;a=blob;f=doc/ref/api-evaluation.texi;h=a23cf1ae48cf2724d5426eb3e0cf898afbf51604;hb=HEAD#l206
> [2] 
> http://git.savannah.gnu.org/gitweb/?p=guile.git;a=blob;f=libguile/read.c;h=c2d50afdfda158c8b06c20650009b7f3d175f27f;hb=HEAD#l1391

While I don't know the answer to your question, Guile 2.0.11 already
seems to support the #| |# syntax, which has been standardized in R7RS,
so I would recommend to use that for block syntax.  Syntax highlighting
in Emacs's scheme-mode seems to already know it too, in Emacs 24.3.
Moreover, it can be nested (both per R7RS, and supported in Guile
2.0.11), whereas #! !# apparently can not.

Taylan



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