On 6/14/07, Brian Mastenbrook brian@mastenbrook.net wrote:

Evan Monroig wrote:

...

When I insert multiple region comments using the #| |# reader syntax, some of the code between the comments becomes highlighted as if it were part of the comments.

For example, in the blurb below, the third "defun" form is displayed as a comment.

This is a longstanding bug (more like design flaw) in the way that Emacs does font lock. You can put a space before the defun form to avoid this issue.

Thanks a lot for your response. I understand that it is difficult to fix.

How exactly do you arrange the source code to avoid this issue? I tried putting a space before the defun form (on the same line), but the highlighting does not change.

Thanks,

Evan

On Jun 14, 2007, at 4:06 AM, Brian Mastenbrook wrote:

Evan Monroig wrote:

...

Hi, When I insert multiple region comments using the #| |# reader syntax, some of the code between the comments becomes highlighted as if it were part of the comments. For example, in the blurb below, the third "defun" form is displayed as a comment.

This is a longstanding bug (more like design flaw) in the way that Emacs does font lock. You can put a space before the defun form to avoid this issue.

Yep. And a very annoying indeed. Sometimes I work around the bug by using #|| and ||# to delimit comments. However you loose the comment highlighting.

Cheers

Marco

Date: Fri, 15 Jun 2007 16:22:14 +0900 From: "Evan Monroig" evan.monroig@gmail.com

Actually this is what I had been doing, not using the #| |# comments because they don't work properly. But I also find them quite nice when I wish to put some code inside them (a toplevel form) that I want to execute some times but not to execute when compiling.

A simpler way around this is to write #+(OR) or #-(AND) before the form. Emacs can handle this, and it will even behave better if you're using something like Paredit Mode, because it still looks like code to Emacs.

On 6/14/07, Helmut Eller heller@common-lisp.net wrote:

Looks right to me. AFAICT, the third defun is actually in a comment. Emacs 22 also seems to understand nested comments like:

"a" #| "b" |# "c" #| "d" #| "e" |# "f" |# "g"

a, c, and g are correctly highlighted as strings and the others as comments.

The opening paren of the third defun is highlighted. As explained in the manual, that can be avoided by writing (. See:

Oh sorry, I had been annoyed by this behavior for quite a while so I decided to make a simple example and sent it, but the example is wrong..

Sorry, I'll post a real example when it comes out.

Evan