antlr4: Ignore superflous tokens when creating ParseTrees

Question

I am developing a compiler for the real-time language PEARL with ANTLR4.

With ANTLR4 my ParseTree is populated with superflous tokens like e.g. semicolons for ending a grammatical unit.

Is there a way to tell ANTLR to ignore these kinds of token?

score 6 · Accepted Answer · edited May 23 '17 at 12:06

6

Is there a way to tell ANTLR to ignore these kind of tokens?

No, but using ANTLR4's built-in listener/visitor, there's no need to remove these tokens.

edited May 23 '17 at 12:06

Community

answered Mar 03 '13 at 11:43

Bart Kiers

Yes, with the current Visitor and Listener methods, doing nothing with the token is literally the same as ignoring it. – TomServo May 27 '17 at 12:28

1 Answers1