[antlr-interest] Set line/col of synthetic token from non-token

Mark Wright markwright at internode.on.net
Thu Jan 27 03:07:06 PST 2011

On Wed, 26 Jan 2011 19:57:45 -0500, Bill Andersen <bill.andersen at mac.com> wrote:
> Folks,
> I have this production
> formula
>   : outer_formula nle?
>     -> ^(STMT[???,"STMT"] ....
>   ;
> where STMT is a synthetic token.  Question is how to pass info for line/col from whatever matches 'outer_formula' to where the STMT synthetic token is created in adaptor.create(...).  I get a tree for outer_formula, not a token.  I know how to do this with tokens.
> Any help appreciated.
> 	.bill

Hi Bill,

One idea is to pass a token from the outer_formula to the inner one,
something like (not tested, so not completely sure this will work):

formula[MyToken t]
  : outer_formula nle?
    -> ^(STMT[$[t,"STMT"] ....

  : o='outer'! formula[$o]

Regards, Mark

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