Re: [Help-source-highlight] Logo

[Lorenzo Bettini]

Martin Gebert wrote:
> If it only were recompiling... ;-)
> First you'll have to write your own scanner; as a template you should 
> look at the cpp_scanner.ll or java_scanner.ll file in the src/ subdir 
> which are the "original ones" and which you could adapt for your 
> purpose. They are simply (?!) Flex files; you can get an overview of 
> Flex here:
>
> http://dinosaur.compilertools.net/

Hi!

Martin is right :-)
I was planning of providing an easier script language for automatically 
generate flex code.

However, if you don't feel like writing a flex scanner for Logo, you can 
provide me with some information about the syntax of the language 
(keywords, comments, strings...) and I'll try to do that for you.

> Sorry if you already knew that. Second you have to include your scanner 
> into the source-highlight code. Lorenzo wanted to write a How-To about 
> including new scanners (you'll mainly have to adapt the Makefiles for 
> that) and to simplify the Makefiles for that purpose, but I don't know 
> how far he's gotten with that; last time I tried to do that (been a 
> while now) it was some work... Hope he'll show up later and explain.

I still haven't done that... :-)

> For testing new scanners, *I* simply replaced one of the other scanners 
> (simply give your scanner file the name of a scanner you want to 
> substitute), made source-highlight anew (by 'make') and called it with 
> the input type of the substituted scanner; the finished scanner was sent 
> to Lorenzo (with a new name). But there have been some obstacles (run 
> the scanner through flex by hand, and AFAI remember also something with 
> sed-ing some constructs in this file), so if you aren't willing to do 
> some work by hand you shouldn't go this way.

now the makefiles do not use sed stuff anymore, and use an option of 
flex :-)

however I use a more recent version of flex, that you have to download 
form the site.

I'm looking forward to hearing from you!

cheers
        Lore

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