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Tamas Papp  
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 More options Jan 22 2012, 9:22 am
Newsgroups: comp.lang.lisp
From: Tamas Papp <tkp...@gmail.com>
Date: Sun, 22 Jan 2012 14:22:37 +0000 (UTC)
Local: Sun, Jan 22 2012 9:22 am
Subject: Re: highlighting let+
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On Sun, 22 Jan 2012 14:02:33 +0000, Tim Bradshaw wrote:
> On 2012-01-22 13:45:07 +0000, Tamas Papp said:

>> Hi,

>> How can I highlight the symbol `let+' in Emacs (SLIME etc, standard
>> setup)?

>> I tried

>>   (font-lock-add-keywords nil
>>                           '(("let+" . font-lock-keyword-face)))

>> but the `+' isn't highlighted, only the `let'.

>> Best,

>> Tamas

> This is really an Emacs question: I don't know if there are still active

You are right, but Emacs is one of the most important IDEs for CL, so
I thought I would try here, because I expect that very few languages
have keywords that have characters like + in them so lispers are most
likely to have run into this problem.

> Emacs newsgroups.  But I'm guessing that the keyword is a regexp so "+"
> is special, and what you've probably defined is a pattern which will
> highlight "lett", "lettt" & so on.  Probably you want "let\\+" or
> "let[+]" or something like that.

Strangely, it is the opposite: in Emacs regexps, + does what you
describe when you escape it.

I have also tried

  (font-lock-add-keywords nil
                          '(("\\<\\(let+\\)" 1 font-lock-keyword-face t)))

which at least doesn't interfere with flet & similar, but the + is
still not highlighted.

Best,

Tamas


 
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