[antlr-interest] Re: check tokens for whitespace?
mazypath
eitan at cs.ucla.edu
Thu Sep 30 13:43:39 PDT 2004
Perfect! Thank you.
I think the best way would be if I could use literals (with an AST
option) in the token definition of the lexer but this a great work around.
--- In antlr-interest at yahoogroups.com, "Bryan Ewbank" <ewbank at s...> wrote:
> > BTW, Right now the only working solution I've found is a
> > very tedious semantic predicate:
> >
> > VAR : {FunctionTests.isFunc(LA(1), LA(2), LA(3), LA(4))}?
> > ('a'..'z') ('a'..'z'|'0'..'9')* { $setType(FUNC) ;} |
> > ('a'..'z') ('a'..'z'|'0'..'9')* ;
>
> How's about this, which I use for recognizing user-defined type names:
>
> VAR : ('a'..'z') ('a'..'z'|'0'..'9')*
> { if (FunctionTests.isFunc($getText)) { $setType(FUNC); } }
>
> Hope this helps,
> - Bryan Ewbank
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