[antlr-interest] [ANTLRWorks][Bug?]

[Ruslan Zasukhin]

Hi Jean,

I have meet strange glitch in the Interpreter, I think it is bug.

Steps to reproduce:
-----------------------

* Copy paste this tiny grammar into  VSQL_Parser.g text file

grammar VSQL_Parser;

options 
{
    k        = 2; 
    output    = AST;
}

sql
    :    'create' 'table' IDENT EOF
    ;

fragment
DIGIT   : ('0'..'9');

fragment
LETTER     : 'a'..'z';

IDENT    : ( LETTER | '_' ) ( LETTER | '_' | DIGIT )* ;



* open this grammar in the AW,
* go to Interpreter panel

* specify as input         create table tt
* click button RUN,  works fine. We see expected diagram.

now

* specify as input         create table t
* click button RUN,  Errors in the console about NULL exception.

As far as I see IDENT Lexer rule is correct. So why interpreter failes with
single character IDENT ???



-- 
Best regards,

Ruslan Zasukhin
VP Engineering and New Technology
Paradigma Software, Inc

Valentina - Joining Worlds of Information
http://www.paradigmasoft.com

[I feel the need: the need for speed]