[antlr-interest] newbie question

[mzukowski at yci.com]

Turn off default error handling with the appropriate option.

Monty

-----Original Message-----
From: Karl Meissner [mailto:meissnersd at yahoo.com] 
Sent: Friday, June 20, 2003 7:46 AM
To: antlr-interest at yahoogroups.com
Subject: [antlr-interest] newbie question


Hi I am new to ANTLR. I have just started working on a grammar.

I have a lot of lexical token rules defined already and a simple top level
parser rule of the form

topParseRule :   ( TokenRule1  | TokenRule2 ) + ; 

It eats  token 1 and 2  but then it hit a token type 3.  It finds the token
but then the 
parse rule does not accept it.   I have default error set to true.   

When the rule did not accept token 3, I expected the parse rule
to throw an recognition exception.  Instead it silently exited.   When I
stepped through the
generated  topParseRule function,   it was finding token3 but then sending
it to the default case
in the switch which just broken out of the for loop with no other action.

So...is this expected behavior?   Is there a way I can put a throw in the
default case from the
grammar definition?

The other idea I had was just checking if there were tokens left on the
input stream.  What is the call to examine the queue of unprocessed tokens?

I am using 2.7.2 and the C# language implementation if it makes any
difference. 

Thanks for any help
Karl 



__________________________________
Do you Yahoo!?
SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com

 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 


 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/