[antlr-interest] Passing RuleReturnScope as argument

[Indhu Bharathi]

Hi, 

Is it not possible to pass an instance of RuleReturnScope as argument to a function? With the following sample, I get the error message 'missing attribute access on rule scope'. Curious to know the reason for this limitation... or am I missing something? Is there a workaround? 

foo : bar1 lbl=bar2 bar3 
{ 
$lbl.start.setText("asdf"); //valid 
act( $lbl ); //invalid 
} 

Thanks, Indhu 

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