Font locking #|...|# block in lisp mode?

Font locking #|...|# block in lisp mode?

[Leo]

Hello all,

Common Lisp can use #| and |# to comment a block however its font
locking is usually wrong in Emacs. I wonder if this can be improved?
Thanks.

Leo

Re: Font locking #|...|# block in lisp mode?

[Stefan Monnier]

> Common Lisp can use #| and |# to comment a block however its font
> locking is usually wrong in Emacs. I wonder if this can be improved?

Don't know: works for me, so I'm not sure what case needs to
be improved.


        Stefan

Re: Font locking #|...|# block in lisp mode?

[Sam Steingold]

Leo wrote:
> Common Lisp can use #| and |# to comment a block however its font
> locking is usually wrong in Emacs. I wonder if this can be improved?

emacs uses the heuristic that "^(" starts a function.
this mean that a paren in column one which does not start a function will mess 
emacs us.
you can add a space before it in comment or backslash in doc string:

(defun f ()
   "Doc which contains parens.
\(backslash disappears in the reader but saves emacs)"
   code...)

#| add a space before "(defun" to help emacs
  (defun f ())
#|

Re: Font locking #|...|# block in lisp mode?

[Leo]

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On 2010-10-26 03:42 +0800, Sam Steingold wrote:
> emacs uses the heuristic that "^(" starts a function.
> this mean that a paren in column one which does not start a function
> will mess emacs us.
> you can add a space before it in comment or backslash in doc string:
>
> (defun f ()
>   "Doc which contains parens.
> \(backslash disappears in the reader but saves emacs)"
>   code...)
>
> #| add a space before "(defun" to help emacs
>  (defun f ())
> #|

On 2010-10-26 03:38 +0800, Stefan Monnier wrote:
> Don't know: works for me, so I'm not sure what case needs to
> be improved.
>
>
>         Stefan

From time to time I have seen code inside #| |# not shown in a comment
face, unfortunately the font locking seems random to me i.e. sometimes
the block is properly font locked after deleting or re-opening the file.

For example:


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I can get |# to be highlighted in a normal face by deleting or inserting
a blank line in front of it.

Leo

Re: Font locking #|...|# block in lisp mode?

[Stefan Monnier]

> From time to time I have seen code inside #| |# not shown in a comment
> face, unfortunately the font locking seems random to me i.e. sometimes
> the block is properly font locked after deleting or re-opening the file.
> For example:
[... Example with open parens highlighted in font-lock-warning face ...]
> I can get |# to be highlighted in a normal face by deleting or inserting
> a blank line in front of it.

Every wondered why those open parens are highlighted in
font-lock-warning face?


        Stefan

Re: Font locking #|...|# block in lisp mode?

[Leo]

On 2010-10-26 12:06 +0800, Stefan Monnier wrote:
> Every wondered why those open parens are highlighted in
> font-lock-warning face?

I tend to ignore them but it'd be great to get rid of them.

Leo

Re: Font locking #|...|# block in lisp mode?

[Stefan Monnier]

>> Every wondered why those open parens are highlighted in
>> font-lock-warning face?
> I tend to ignore them but it'd be great to get rid of them.

Easy: put a backslash in front the of open paren.  Or did you mean
something else?


        Stefan

Re: Font locking #|...|# block in lisp mode?

[Leo]

On 2010-11-09 03:23 +0800, Stefan Monnier wrote:
>>> Every wondered why those open parens are highlighted in
>>> font-lock-warning face?
>> I tend to ignore them but it'd be great to get rid of them.
>
> Easy: put a backslash in front the of open paren.  Or did you mean
> something else?
>
>
>         Stefan

I meant without having to insert \.

Leo