From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: HELP, PLEASE! Syntax problem!
Date: Wed, 25 Nov 2009 09:43:01 -0500 [thread overview]
Message-ID: <jwvws1ehdsi.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20091125125810.GA4734@muc.de> (Alan Mackenzie's message of "Wed, 25 Nov 2009 12:58:10 +0000")
> In the following fragment of code:
> 1 int a = foo (
> 2 1);
> 3 #define X(A, B) \
> 4 do { \
> 5 printf (A, B); \
> 6 } while (0)
> 7 int a = foo (
> 8 1);
> , there is a C macro between lines 3 and 6. The syntax-table properties
> here have been manipulated (see below). Putting point at the "(" in L5
> and doing C-M-n takes point to after ")" ON LINE 8. Similar things
> happen with C-M-p, C-M-u from various places inside the macro
> Evidently, all syntactic properties inside the macro have been
> suppressed. This is not wanted.
The first problem is most likely that `syntax-table' is only special for
text-properties, not for char-properties in general (i.e. when placed
on an overlay, it has no effect).
Of course, the real problem is that the syntax-table hacking you're
doing here is just that: a hack. Maybe another hack would have fewer
shortcomings? E.g. maybe you could place a syntax-table property on the
# that says "beginning of comment" and a matching "end of comment" on
the newline that terminates line 6? Then again, our syntax-tables are
too limited in their comment handling, so given that CC already uses
most forms of comments, it'll be difficult to make sure that # only
matches that particular comment ender and not just "any \n" or "*/", but
maybe just marking the "\\\n" that get in the way as "punctuation" would
solve it?
Stefan
next prev parent reply other threads:[~2009-11-25 14:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-25 12:58 HELP, PLEASE! Syntax problem! Alan Mackenzie
2009-11-25 14:43 ` Stefan Monnier [this message]
2009-11-25 20:30 ` Alan Mackenzie
2009-11-25 21:45 ` Stefan Monnier
2009-11-25 22:13 ` Alan Mackenzie
2009-11-26 0:12 ` Stephen J. Turnbull
2009-11-26 8:53 ` Alan Mackenzie
2009-11-26 15:48 ` Stephen J. Turnbull
2009-11-27 9:16 ` Alan Mackenzie
2009-11-27 9:56 ` David Kastrup
2009-11-27 10:44 ` Alan Mackenzie
2009-11-27 8:16 ` A Soare
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