[texworks] Regex challenges

Jonathan Kew jfkthame at googlemail.com
Fri Apr 10 15:45:00 CEST 2009

On 10 Apr 2009, at 14:01, Joseph Wright wrote:

> Hello all,
> I'm trying to improve my set of regex expressions for writing DTX  
> files.
> There are a couple I'm stuck on: suggestions welcome.
> 1) The standard pattern for matching control sequences is
> \\(?:[A-Za-z@]+|.) This behaves OK unless I follow the sequence by a '
> character. If I do, anything following the last @ is not coloured but
> stays black.  If I extend the match sequence for LaTeX3-like code
> \\(?:[A-Za-z at _:]+|.) then anything after the last non-letter (@, :, _)
> is not coloured.  Is my expression defective or is this the matching  
> system?

I'm not seeing the behavior you describe, as far as I understand it;  

   \this at is@a at test'with quotes following'

colours everything up to "test" (but not including "'with") as the  
control sequence.

What version and platform are you on?

> 2) In a DTX, comments in the explanation part start ^^A. This is  
> easy to
> match with \^\^A, but that matches even in the code blocks.  Ideally,
> I'd like:
>  - If the line start %, comment = ^^A
>  - If the line starts without %, comment = %
> but only colouring from the start of the comment, not the start of the
> line.  Is this doable at all?

I can't think of a way to do this.


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