[antlr-interest] tree grammar question...

[pady]

In my parser, I have rules like...

statement
 : assignment
 | ifStatement
 | compoundStatement
 ;

compoundStatement
 : '{' statement* '}' -> statement*
 ;

In the equivalent tree grammar, I have

statement
 : assignment
 | ifStatement
 | compoundStatement
 ;

compoundStatement
 : statement* // using the rewrite rule alone...
 ;

But when i build my tree grammar, I get a "mutually left-recursive" rule 
error between statement/compoundStatement. I dont get this error when 
building the parser grammar. I understand the issue, but I am not sure how 
this can be resolved. I saw a similar rule in the java tree grammar in the 
antlr grammar list. Not sure how the tree grammar there will avoid this 
left-recursive error.

Thanks

-- pady