slogo.instruction.drawing
Class IsPenDown

java.lang.Object
  slogo.language.GrammarElement
      slogo.instruction.Instruction
          slogo.instruction.drawing.IsPenDown

public class IsPenDown
extends Instruction

returns 1 (:TRUE) if the pen is down, 0 (:FALSE) if it's up.

Author:

tshishikub

Field Summary

Fields inherited from class slogo.language.GrammarElement

gelementsToValue

Constructor Summary

IsPenDown()

Method Summary

java.lang.Object

evaluate(Context c) returns 1 (:TRUE) if the pen is down, 0 (:FALSE) if it's up.

Methods inherited from class slogo.instruction.Instruction

evaluateNumericExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

IsPenDown

public IsPenDown()

Method Detail

evaluate

public java.lang.Object evaluate(Context c)

returns 1 (:TRUE) if the pen is down, 0 (:FALSE) if it's up.

Overrides:

evaluate in class Instruction

Parameters:

c - context in which the evaluation takes place

Returns:

the result of evaluating the construct