[antlr-interest] XPath - identifiers are keywords
merrells at sleepycat.com
Tue Jul 2 15:29:08 PDT 2002
This is probably simple, but I've failed to find an explicit answer
in the documentation or the FAQ. I have a language (XPath) and
it has some keywords that can also be identifiers. How do I set
up my lexer rules for this? The identifier is called NCNAME and
is defined thus:
: (LETTER|'_') (NCNAMECHAR)*
The keyword is 'comment', and when it's a keyword it is always
followed by '(' ')'. So I tried just adding...
But that's ambiguous, so I tried adding a lexer rule to disambiguate
between them, but I either got that wrong, or it didn't work. Should
I increase k to be length("comment()")? That seems like overkill.
I'm sure there's something obvious that I'm missing here...
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