slogo.instruction

Class Less

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.Less

public class Less
extends Instruction

Field Summary

Fields

Modifier and Type	Field and Description
private GrammarElement	expression1
private GrammarElement	expression2

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
Less(GrammarElement e, GrammarElement f) Represents a less instruction that can be executed

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

Field Detail

expression1

private GrammarElement expression1

expression2

private GrammarElement expression2

Constructor Detail

Less

public Less(GrammarElement e,
            GrammarElement f)

Represents a less instruction that can be executed

Parameters:

e - the first element in the less

f - the second element in the less

Method Detail

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 - context in which the evaluation takes place

Returns:

the result of evaluating the construct

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

the difference with the two expressions