jelan.elan.instruction
Class Instruction

java.lang.Object
  jelan.elan.GrammarElement
      jelan.elan.instruction.Instruction

Direct Known Subclasses:

Assignment, Print, Repeat, StrictInstructionList

public abstract class Instruction
extends GrammarElement

Represents an instruction in the SLogo language

Constructor Summary

Instruction()

Method Summary

java.lang.Object

evaluate(Context c) Evaluate this language construct in some context.

Methods inherited from class java.lang.Object

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

Constructor Detail

Instruction

public Instruction()

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 GrammarElement

Parameters:

c - context in which the evaluation takes place

Returns:

the result of evaluating the construct