de.uka.ilkd.key.strategy.feature

Class NotBelowQuantifierFeature

java.lang.Object

de.uka.ilkd.key.strategy.feature.BinaryFeature

de.uka.ilkd.key.strategy.feature.NotBelowQuantifierFeature

All Implemented Interfaces:

Feature

public class NotBelowQuantifierFeature
extends BinaryFeature

Binary feature that returns zero iff the position of the given rule app is not within the scope of a quantifier

Field Summary

Fields

Modifier and Type	Field and Description
static Feature	INSTANCE

Fields inherited from class de.uka.ilkd.key.strategy.feature.BinaryFeature

TOP_COST, ZERO_COST

Constructor Summary

Constructors

Modifier	Constructor and Description
private	NotBelowQuantifierFeature()

Method Summary

Modifier and Type	Method and Description
private boolean	belowQuantifier(PosInOccurrence pos)
boolean	filter(RuleApp app, PosInOccurrence pos, Goal goal) Compute whether the result of the feature is zero (true) or infinity (false)

Methods inherited from class de.uka.ilkd.key.strategy.feature.BinaryFeature

computeCost

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final Feature INSTANCE

Constructor Detail

NotBelowQuantifierFeature

private NotBelowQuantifierFeature()

Method Detail

filter

public boolean filter(RuleApp app,
                      PosInOccurrence pos,
                      Goal goal)

Description copied from class: BinaryFeature

Compute whether the result of the feature is zero (true) or infinity (false)

Specified by:

filter in class BinaryFeature

Parameters:

app - the RuleApp

pos - position where app is to be applied

goal - the goal on which app is to be applied

Returns:

true iff the the result of the feature is supposed to be zero.

belowQuantifier

private boolean belowQuantifier(PosInOccurrence pos)

Returns:

true iff the given position is in the scope of a quantifier