slogo.instruction

Class PenUp

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.PenUp

public class PenUp
extends Instruction

Sets the pen's position to UP

Field Summary

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
PenUp() Represents a PENUP instruction

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this language construct in some context.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

PenUp

public PenUp()

Represents a PENUP instruction

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a String representation of PenUp

evaluate

public java.lang.Object evaluate(Context c)

Description copied from class: GrammarElement

Evaluate this language construct in some context. The evaluation may have side-effects, e.g., moving a turtle.

Specified by:

evaluate in class Instruction

Parameters:

c - is the Context of what we are evaluating

Returns:

the turtle with the pen in the up position