[antlr-interest] grammar for single-line comments

[Mark Volkmann]

I'm having trouble adding support for single-line comments to my grammar.
It's probably a simple mistake, but I don't see it.
Here's the part of my grammar that deals with comments.

COMMENT_LINE:
  '#'
  (options { greedy = false; } : .)*
  (NEWLINE | EOF)
  { $channel = HIDDEN; };

NEWLINE: '\r'? '\n' { $channel = HIDDEN; };

My sample input is just a single comment line with no NEWLINE at the end.

# This is a comment.

I get these error messages from the generated parser.

line 1:1 mismatched character ' ' expecting '<EOF>'
line 1:19 no viable alternative at character '.'

-- 
R. Mark Volkmann
Object Computing, Inc.