[antlr-interest] java.g, java.tree.g, and SUPER_CTOR_CALL

[Monty Zukowski]

On Nov 24, 2004, at 6:24 AM, Jim O'Connor wrote:

>
>  
>
> The if condition fails with "_t" holding the SUPER_CTOR_CALL value.  
> The SUPER_CTOR_CALL is in the following rule tree, and only in this 
> rule tree.  
>
>  
>
> stat: typeDefinition
>
>       |     variableDef
>
>       |     expression
>
> ....... others
>
>  
>
>       ;
>
>  
>
>  
>
> Expression   //Offending parent???? EXPR
>
>       :     #(EXPR expr)
>
>       ;
>
>  
>
>  
>
> expr: #(QUESTION expr expr expr)    // trinary operator
>
>  
>
> ....... others
>
>  
>
>  
>
>       |     primaryExpression
>
>       ;
>
>  
>
>  
>
> primaryExpression
>
>     :   IDENT
>
> ....... others
>
>  
>
>       |     ctorCall
>
>  
>
> ....... others
>
>       ;
>
>  
>
>  
>
>  
>
>  
>
> ctorCall
>
>       :     #( CTOR_CALL elist )
>
>       |     #( SUPER_CTOR_CALL
>
>                   (     elist
>
>                   |     primaryExpression elist
>
>                   )
>
>              )
>
>       ;
>
>  
>
>  
>
> It appears that the SUPER_CTOR_CALL is in the stat list but shoved 
> down below the #(EXPR expr) tree.  There are comments about 
> ambiguities.  I don't want to insert the ctorCall into a spot that 
> would cause more problems.  Should I concentrate on java.g or 
> java.tree.g?

I'm not totally sure what the author's intent was, but the simplest 
solution seems to be to wrap the ctors into a #(EXPR parent)

explicitConstructorInvocation

    :   ( "this"! lp1:LPAREN^ argList RPAREN! SEMI!

            {#lp1.setType(CTOR_CALL);}

    |   "super"! lp2:LPAREN^ argList RPAREN! SEMI!

            {#lp2.setType(SUPER_CTOR_CALL);}
	)
	{ ##=#(#[EXPR],##);}
    ;

 
Monty


 
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