[antlr-interest] dfa-based lexers versus top-down antlr lexers

Terence Parr parrt at jguru.com
Wed Apr 30 09:18:16 PDT 2003


On Wednesday, April 30, 2003, at 07:05  AM, Greg Lindholm wrote:

> I've done a couple projects using ANTLR and have not yet
> been able to use the lexer.  I've had to hand-craft my own
> lexer's because of column positional token's issues.

Hi :)

2.7.2 allows predicates on the left edge of lexer rules so you can say:

{getColumn()==1}?

and have it work :)

Ter
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