i decided to extend my grammar for characters
and i added:
factor : '-'? (NUMBER )
| character
;
character : AP (LETTER | NUMBER) AP;
AP : '\'';
LETTER : 'A'..'Z' | 'a'..'Z';
NUMBER : '0'..'9'+;
it's compile with no error
which is good,
i running program and i’m sending
2+3*3 >= 'a' + 2
and that gave me
(>= (+ 2 (* 3 3)) (+ ' ' 2))
line 1:10 no viable alternative at character 'a'
clearly this grammar can’t handle characters
can somebody tell me what i’m doing wrong
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