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Re: [Help-source-highlight] Logo

From: Lorenzo Bettini
Subject: Re: [Help-source-highlight] Logo
Date: Wed, 09 Apr 2003 17:28:35 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030313

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:


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!


|  Lorenzo Bettini          ICQ# lbetto, 16080134     |
|  PhD in Computer Science                            |
|  Dip. Sistemi e Informatica, Univ. di Firenze       |
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