slogo.instruction.arithmetic
Class NumericInstruction

java.lang.Object
  extended by slogo.language.GrammarElement
      extended by slogo.instruction.Instruction
          extended by slogo.instruction.arithmetic.NumericInstruction
Direct Known Subclasses:
ArithmeticInstruction, Heading, XCor, YCor

public abstract class NumericInstruction
extends Instruction


Field Summary
 
Fields inherited from class slogo.language.GrammarElement
gelementsToValue
 
Constructor Summary
NumericInstruction()
           
 
Method Summary
abstract  java.lang.Double evaluate(Context c)
          Evaluate this language construct in some context.
 
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

NumericInstruction

public NumericInstruction()
Method Detail

evaluate

public abstract java.lang.Double 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.

Overrides:
evaluate in class Instruction
Parameters:
c - context in which the evaluation takes place
Returns:
the result of evaluating the construct