[antlr-interest] Token position 0, -1

[Ale Strooisma]

Hi Mike,

Rules don't have a location, but you can make a rule return a value, so 
if you let your rule return a token, you can do it like this:

target_table
     : rv=qualified_identifier ->  ^(TABLE_REF_ID[rv] qualified_identifier)
     ;

And then qualified identifier should look something like this:

qualified_identifier returns [CommonToken rv = null;]
     : ... t=SOME_TERMINAL ... {rv=$t;}
     ;

In my code I made all my rules return their root-token in this way.
If you still have any questions about how or why it works, just ask.

Good luck,
Ale


On 07/09/2012 02:29 PM, Mike Lischke wrote:
> Stefan,
>
>    
>> compoundStatement
>> 	:  lc='{' statement*  '}'
>> 		->   ^(SLIST[$lc]  statement*)
>> 	;
>>      
> Is there a similar construct if you have a rule instead of a token? For instance:
>
> target_table:
> 	qualified_identifier ->  ^(TABLE_REF_ID qualified_identifier)
> ;
> 	
> Here I would like to give the synthetic TABLE_REF_ID token the location info from the qualified_identifier rule.
>
> Mike
>