org.nfunk.jep.function

Class Ele

java.lang.Object

org.nfunk.jep.function.PostfixMathCommand

org.nfunk.jep.function.Ele

All Implemented Interfaces:

LValueI, PostfixMathCommandI

public class Ele
extends PostfixMathCommand
implements LValueI

Function which allows array access using the a[3] notation on left and right hand side. a=[4,3,2,1]; a[2]; // returns 2 a[2]=5; // a is now [4,5,2,1]

Author:

Richard Morris

Field Summary

Fields inherited from class org.nfunk.jep.function.PostfixMathCommand

curNumberOfParameters, numberOfParameters

Constructor Summary

Constructors

Constructor and Description
Ele()

Method Summary

Modifier and Type	Method and Description
void	run(Stack s) Throws an exception because this method should never be called under normal circumstances.
void	set(EvaluatorI pv, Node node, Object value) Performs appropriate action to set an LValue.

Methods inherited from class org.nfunk.jep.function.PostfixMathCommand

checkNumberOfParameters, checkStack, getNumberOfParameters, setCurNumberOfParameters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Ele

public Ele()

Method Detail

set

public void set(EvaluatorI pv,
                Node node,
                Object value)
         throws ParseException

Description copied from interface: LValueI

Performs appropriate action to set an LValue.

Specified by:

set in interface LValueI

Parameters:

pv - a pointer to the evaluator. The pv.eval() method can be used to evaluate the children of the node.

node - The top node for the LValue

value - the value obtained by evaluating the right hand side.

Throws:

ParseException

run

public void run(Stack s)
         throws ParseException

Description copied from class: PostfixMathCommand

Throws an exception because this method should never be called under normal circumstances. Each function should use it's own run() method for evaluating the function. This includes popping off the parameters from the stack, and pushing the result back on the stack.

Specified by:

run in interface PostfixMathCommandI

Overrides:

run in class PostfixMathCommand

Throws:

ParseException