RE: using flex for source-hilighting

[Janus N.]

On Mon, 2002-06-10 at 10:29, Valkanas Nikos wrote:
> Hi,
> 
> Being one of the performance die-hards, I feel obliged to offer a solution.
> 
> It is rather straightforward to implement it yourself through lex. Declare a 
> global integer, floc, and increment in every production by +=yylen (Take care 
> if you are using yyless() to increment only by yyless). You can then return 
> this number at the beginning of a token  (before adding yylen) and after 
> (assumming you match exactly a token). The advantage is that you can easily 
> manipulate it to get exactly what you need (minus parens or white space for 
> example). You could also define it with YY_USER_ACTION but I wouldn't 
> recommend it if you are using yyless or other similar functions that back up 
> the stream.
> 

Thank you for your suggestion. I actually already tried this ... but I
could give it another shot. I implemented the needed lexer by hand but
it is a lot harder to maintain than a lex file so I hope I can make this
work :)

-Janus
-- 
Janus Nørgaard Tøndering        
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