[antlr-interest] newbie question - mismatched input/token

[Gavin Lambert]

At 12:15 18/01/2008, Ashish wrote:
>I'm trying to come up with a custom select statement. However, 
>for the
>simple grammar and input I get a mismatched-token error - see 
>details below.
[...]
>//Input
>SELECT a FROM b
>
>//Error message:
>recoverFromMismatchedToken
>BR.recoverFromMismatchedToken
>line 1:0 mismatched input 'SELECT' expecting FROM

The grammar all looks fine to me.  Are you sure you're choosing 
"prog" as your start rule?  (Also, generally speaking, your start 
rule should have EOF at the end to make it give an error if it 
can't match the entire input.)

>SELECT : 'select'|'SELECT';
>FROM : 'from'|'FROM';
>WHERE : 'where'|'WHERE';

Note that these are insufficient for true case insensitivity.  It 
won't match "Select" or "sELeCt", for example.