public object visitSuperExpr(Expr.Super expr)
{
if (currentClass == ClassType.NONE)
{
Jingle.Error(expr.keyword, "Cannot use 'super' outside of a class.");
}
else if (currentClass != ClassType.SUBCLASS)
{
Jingle.Error(expr.keyword, "Cannot use 'super' in a class with no superclass.");
}
resolveLocal(expr, expr.keyword);
return(null);
}
public object visitSuperExpr(Expr.Super expr)
{
int distance = locals[expr];
JingleClass superclass = (JingleClass)environment.getAt(distance, "super");
Instance object_ = (Instance)environment.getAt(distance - 1, "this");
JingleFunc method = superclass.findMethod(expr.method.lexeme);
if (method == null)
{
throw new RuntimeError(expr.method, "Undefined property '" + expr.method.lexeme + "'.");
}
return(method.bind(object_));
}
public string visitSuperExpr(Expr.Super expr)
{
return("");
}