[antlr-interest] ANTLRWorks, Internal ERROR with my grammar.
Ruslan Zasukhin
sunshine at public.kherson.ua
Mon Jan 21 22:07:20 PST 2008
On 22/1/08 1:50 AM, "Terence Parr" <parrt at cs.usfca.edu> wrote:
Hi All,
> Hi, this is a known ANTLR issue where it doesn't give a good message
> when you use ! or ^ and no output=AST option.
Then may be Jean can improve ANTLRWorks to give at least warning if grammar
have this?
> Ter
> On Jan 21, 2008, at 2:14 PM, Ruslan Zasukhin wrote:
>
>>> On 21/1/08 9:50 PM, "Ruslan Zasukhin" <sunshine at public.kherson.ua>
>>> wrote:
>>
>> Hi Again,
>>
>>>> * debugger even do not starts and show dialog about INTERNAL ERROR.
>>>> see attached picture.
>>
>> I have found reason why debugger fails to start.
>>
>> For this I have start reduce our grammar as much as possible and
>> have come
>> to this:
>>
>> ----------------------------------
>> grammar VSQL_Parser;
>>
>> sql
>> : sql_single EOF!
>> ;
>>
>> sql_single : 'create' 'table' IDENT;
>>
>> IDENT : ('a'..'z'|'A'..'Z')+ ;
>> INT : '0'..'9'+ ;
>> NEWLINE:'\r'? '\n' ;
>> WS : (' '|'\t')+ {skip();} ;
>> ----------------------------------
>>
>> And we still get this internal error
>> Solution is to remove ! Near to EOF!
>>
>> Its never mind where ! Is located.
>>
>> For example this also produce this error sometimes. But on the
>> second run it
>> seems works fine..
>>
>>
>> ----------------------------------
>> grammar VSQL_Parser;
>>
>> sql
>> : sql_single EOF
>> ;
>>
>> sql_single : 'create' 'table'! IDENT;
>>
>> IDENT : ('a'..'z'|'A'..'Z')+ ;
>> INT : '0'..'9'+ ;
>> NEWLINE:'\r'? '\n' ;
>> WS : (' '|'\t')+ {skip();} ;
>> ----------------------------------
>>
>>
>> Why this happens? My bug? ANTRLWorks bug ?
--
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]
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