Description Moritz Eysholdt 2010-06-24 11:09:51 EDT

With the following grammar:

--------
Model:
  greetings+=Greeting*;

Greeting:
  "Hello" name=NAME single=NAME? (double+=NAME double+=NAME)*;

NAME hidden():
  ID ('.' ID)*;
--------

The document "Hello foo bar" raises the error "mismatched input ' ' expecting RULE_ID". The the whitespace it complains about it the one between foo and bar.

Same for "Hello foo bar zzz" and the whitespace between bar and zzz.
Same for "Hello foo bar zzz yyy" and the whitespaces between (foo and bar) + (zzz and yyy).


The grammar works as intended if "hidden()" is omitted. 

The cause for this error could be that the range of suppressed hidden tokens is larger than just within NAME. However, this explanation seems to be contradictory to "Greeting: 'Hello' name=NAME single=NAME?;" being perfectly able to parse "Hello foo bar".