[antlr-interest] Please advice about float

[Martin Probst]

Hi,

> I understand your point and agree that perhaps the implication is not 
> ideal. However in my parser I want to sometimes parse INT's and other 
> times REAL's and not NUMBER's that can be either.

You can set the type of a token within the rule, e.g.:

NUMBER:
  INT ( FLOATPART { $setType(FLOAT);})?

FLOATPART:
  '.' INT { $setType(FLOAT); }

So if you just have an INT, then the corresponding token will be a
NUMBER, but if it goes on into the FLOATPART parentheses the type will
be set to FLOAT. I made the rule FLOATPART public with a type setter so
that it's also possible to parse ".5" as a FLOAT.

Martin