Class PostDec

    • Constructor Detail

      • PostDec

        public PostDec()
    • Method Detail

      • evaluate

        public java.lang.Object evaluate​(Node node,
                                         Evaluator pv)
                                  throws EvaluationException
        Description copied from interface: CallbackEvaluationI
        Performs some special evaluation on the node. This method has the responsibility for evaluating the children of the node and it should generally call
         pv.eval(node.jjtGetChild(i))   
         
        for each child. The SymbolTable is not passed as an argument. This is because it is better practice to get and set variable values by using node.getVar().setValue() rather that through the SymbolTable with requires a hashtable lookup.
        Parameters:
        node - The current node
        pv - The visitor, can be used evaluate the children
        Returns:
        the value after evaluation. This value will be passed to other functions higher up the node tree. The value can be any type including Double or Vector<Object>
        Throws:
        EvaluationException - if the calculation cannot be performed
        See Also:
        Evaluator