I've emailed Simon directly about this, but got no reply, so I'm trying again here. I'd like to write a PN lexer for BBC BASIC, but it has unusual requirements: keywords do not (necessarily) need to be surrounded by whitespace. For example the following is legal syntax in BBC BASIC (although not encouraged!):
x = DEGACSCOSPI
where 'DEG', 'ACS', 'COS' and 'PI' are all separate keywords! Can a custom PN lexer handle this situation, and if so where can I find out how to write it?
simon
PN Developer
Hi,
Sorry, as you'll note it's easier to get a support reply on the forums, e-mails tend to get lost in the deluge!
In order to support this form of keyword combination you'd have to write a lexer using C/C++. The xml-based lexers all assume non-keyword characters as delimiters - it aims to cope with common requirements.
If you're interested in working on a lexer like that I can probably help you with further guidance.
Simon.
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