[antlr-interest] Matching Last Line in ANTLR?

[Gavin Lambert]

At 08:08 19/08/2009, consiliens at gmail.com wrote:
 >I want to use your solution, however it throws errors about "The 

 >following alternatives can never be matched: 1" for MC_QUESTION
 >and MC_INCORRECT. Shouldn't the below work?
 >
 >MC_QUESTION  : INT ('.'|')') .* ENDOFLINE;
 >MC_INCORRECT : LETTER '.' .* ENDOFLINE;
 >MC_CORRECT   : '*' MC_INCORRECT;
 >
 >fragment ENDOFLINE : NEWLINE | { input.LA(1) == EOF }?;

No.  You can't use a .* wildcard loop without (a) always having at 
least one termination character and (b) specifying it inline 
rather than in a subrule.

If you remove the .* (or make it more specific, eg. WS*) then it 
should work.