Class TrueOperator

java.lang.Object

com.ibm.wala.fixpoint.AbstractOperator<BooleanVariable>

com.ibm.wala.fixpoint.UnaryOperator<BooleanVariable>

com.ibm.wala.fixpoint.TrueOperator

All Implemented Interfaces:

FixedPointConstants

public final class TrueOperator
extends UnaryOperator<BooleanVariable>

Operator U(n) = true

Field Summary

Fields inherited from interface FixedPointConstants

CHANGED, CHANGED_AND_FIXED, CHANGED_MASK, FIXED_MASK, NOT_CHANGED, NOT_CHANGED_AND_FIXED, SIDE_EFFECT_MASK

Modifier and Type	Field	Description
static final byte	CHANGED	A return value which indicates that a lhs has changed, and the statement might need to be evaluated again.
static final byte	CHANGED_AND_FIXED	A return value which indicates that lhs has changed, and the statement need not be evaluated again.
static final int	CHANGED_MASK	The bit-mask which defines the "CHANGED" flag
static final int	FIXED_MASK	The bit-mask which defines the "FIXED" flag
static final byte	NOT_CHANGED	A return value which indicates that lhs has not changed, and the statement might need to be evaluated again.
static final byte	NOT_CHANGED_AND_FIXED	A return value which indicates that lhs has not changed, and the statement need not be evaluated again.
static final int	SIDE_EFFECT_MASK	The bit-mask which defines the "SIDE EFFECT" flag

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
byte	evaluate(@Nullable BooleanVariable lhs, BooleanVariable rhs)	Evaluate this equation, setting a new value for the left-hand side.
int	hashCode()
static TrueOperator	instance()
String	toString()

Methods inherited from class UnaryOperator

evaluate, isIdentity, makeEquation

Modifier and Type	Method	Description
byte	evaluate(BooleanVariable lhs, BooleanVariable[] rhs)	Evaluate this equation, setting a new value for the left-hand side.
boolean	isIdentity()
UnaryStatement<BooleanVariable>	makeEquation(BooleanVariable lhs, BooleanVariable rhs)	Create an equation which uses this operator Override in subclasses for efficiency.

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

instance

public static TrueOperator instance()

evaluate

public byte evaluate(@Nullable BooleanVariable lhs,
 BooleanVariable rhs)
              throws IllegalArgumentException

Description copied from class: UnaryOperator

Evaluate this equation, setting a new value for the left-hand side.

Specified by:

evaluate in class UnaryOperator<BooleanVariable>

Returns:

a constant defined by FixedPointConstants that reflects whether the lhs value changed

Throws:

IllegalArgumentException

toString

public String toString()

Specified by:

toString in class AbstractOperator<BooleanVariable>

hashCode

public int hashCode()

Specified by:

hashCode in class AbstractOperator<BooleanVariable>

equals

public boolean equals(Object o)

Specified by:

equals in class AbstractOperator<BooleanVariable>