[erlang-patches] Tweaking regexp in erlang-font-lock-keywords-vars

Thomas Järvstrand <>
Wed Nov 7 13:29:34 CET 2012


This is embarrasing. Turns out this version gives variable highlighing in
comments.

T

2012/11/7 Thomas Järvstrand <>

> Hi!
>
> I've updated the patch.
>
> Currently font-lock fontification in erlang-mode fails for the first
> erlang variable in the fontification region if the region to fontify starts
> on the same position as the variable. This is because the current regexp
> requires at least one character (any character except #) to be present
> before the actual variable names starts. This patch exchanges the straight
> regexp with a fun that searches for a match for erlang-variable-regexp and
> then asserts that the match is not preceeded by a #, thus relieving the
> requirement of at least one preceeding character to be present in the
> search range before a variable name.
>
>
> The use case is that I'm trying to accomplish syntax highlighting in the
> erlang-shell inside Emacs and the problem I encountered was that in the
> following example only Bar would be highlighted as a variable.
>
> 1> Foo = Bar.
>>
>
> Repo:
> git fetch :tjarvstrand/
> otp.git erlang-font-lock-keyword-vars
>
> Comparison:
> https://github.com/tjarvstrand/otp/compare/erlang-font-lock-keyword-vars
>
> https://github.com/tjarvstrand/otp/compare/erlang-font-lock-keyword-vars.patch
>
> Regards
> Thomas Järvstrand
>
>
> 2012/11/6 Thomas Järvstrand <>
>
>> Please disregard this patch, it does not work as intended. Sorry for the
>> noise.
>>
>> Thomas
>>
>>
>> 2012/11/6 Thomas Järvstrand <>
>>
>>> Hi!
>>>
>>> Currently font-lock fontification in erlang-mode fails for the first
>>> erlang variable in the fontification region if the region to fontify starts
>>> on the same position as the variable. This is because the current regexp
>>> requires at least one character (any character except #) to be present
>>> before the actual variable names starts. This patch tweaks the regexp
>>> slightly to allow either a start-of-word or a non-# at the head of the
>>> variable-name.
>>>
>>> The use case is that I'm trying to accomplish syntax highlighting in the
>>> erlang-shell inside Emacs and the problem I encountered was that in the
>>> following example only Bar would be highlighted as a variable.
>>>
>>> 1> Foo = Bar.
>>>>
>>>
>>> Repo:
>>> git fetch :tjarvstrand/otp.git
>>> erlang-font-lock-keyword-vars
>>>
>>> Comparison:
>>> https://github.com/tjarvstrand/otp/compare/erlang-font-lock-keyword-vars
>>>
>>> https://github.com/tjarvstrand/otp/compare/erlang-font-lock-keyword-vars.patch
>>>
>>> Regards
>>>
>>
>>
>
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