[antlr-interest] Matching Last Line in ANTLR?

[Gavin Lambert]

At 09:05 19/08/2009, consiliens at gmail.com wrote:
 >For testing I removed the .* and, while there are no errors, it
 >still doesn't match b. as the token MC_INCORRECT unless there
 >is a newline after it.
[...]
 >MC_QUESTION  : INT ('.'|')') ENDOFLINE;
 >MC_INCORRECT : LETTER '.' ENDOFLINE;
 >MC_CORRECT   : '*' MC_INCORRECT;
 >
 >fragment ENDOFLINE : NEWLINE | { input.LA(1) == EOF }?;

Are you using the debugger or the interpreter to test with?  The 
interpreter doesn't execute predicates, so it won't work properly; 
you need to use the debugger.

It also might pay to try a few variations on the ENDOFLINE rule; 
sometimes ANTLR seems to ignore predicates if it thinks that 
they're not accomplishing anything.  Try this, for example:

fragment ENDOFLINE : { input.LA(1) == EOF }? => | NEWLINE ;

or this:

fragment ENDOFLINE : NEWLINE | EOF ;