[antlr-interest] AntLR grammar problems.

[Bharath S]

Hi Ter,

I am not running my antlr project on CVS yet. So its
not a revision control issue. Does token disconnect
mean that I am referring to the token wrongly in my
parser? (For eg, defining a token called INT and
trying to parse INTEGER, which has not been defined?)

Please let me know. Another funny observation is that,
when I have my lex rule as
---------------------------------------------------
IDENTIFIER options{testLiterals=true;}:
('_'(LETTER|INT))|(LETTER'_'LETTER);
---------------------------------------------------
it works. But if i change the (LETTER'_'LETTER) in the
above rule to just (LETTER)+, it says "expecting
identifier, found "abcd"; LETTER: ('0'..'9'); by the
way.

Thanks.

--- Terence Parr <parrt at cs.usfca.edu> wrote:
> 
> On Mar 25, 2004, at 12:23 PM, Bharath S wrote:
> > This happened earlier but the mistake disappeared
> by
> > itself. Also, when i try delete the lexer so that
> i
> > would recreate the lexer instead of overwriting
> it, it
> > often says "OUT OF SYNC WITH THE SYSTEM".
> 
> Hi. :)  To start with it sounds like you have a
> revision control issue.
> 
> Then for your grammar, you probably have a token
> type disconnect 
> between lexer and parser.
> 
> Ter
> --
> Professor Comp. Sci., University of San Francisco
> Creator, ANTLR Parser Generator,
> http://www.antlr.org
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