dk.brics.string.intermediate.operations
Enum AliasStatus

java.lang.Object
  java.lang.Enum<AliasStatus>
      dk.brics.string.intermediate.operations.AliasStatus

All Implemented Interfaces:

Serializable, Comparable<AliasStatus>

public enum AliasStatus
extends Enum<AliasStatus>

Describes the known aliasing status between two variables. Represents the elements of the lattice:

    MAYBE
   /     \
  NOT  DEFINITELY
   \     /
    BOTTOM
 

Enum Constant Summary

BOTTOM
Bottom element.

DEFINITELY
The two variables are definitely aliased.

MAYBE
The two variables may or may not be aliased.

NOT
The two variables are definitely not aliased.

Method Summary

AliasStatus	greatestLowerBound(AliasStatus other)
boolean	isDefinitelyOrBottom() Returns true if this is DEFINITELY or BOTTOM.
AliasStatus	leastUpperBound(AliasStatus other)
boolean	mightBeAlias() Returns true if this is DEFINITELY or MAYBE.
static AliasStatus	valueOf(String name) Returns the enum constant of this type with the specified name.
static AliasStatus[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

BOTTOM

public static final AliasStatus BOTTOM

Bottom element.

DEFINITELY

public static final AliasStatus DEFINITELY

The two variables are definitely aliased.

MAYBE

public static final AliasStatus MAYBE

The two variables may or may not be aliased.

NOT

public static final AliasStatus NOT

The two variables are definitely not aliased.

Method Detail

greatestLowerBound

public AliasStatus greatestLowerBound(AliasStatus other)

isDefinitelyOrBottom

public boolean isDefinitelyOrBottom()

Returns true if this is DEFINITELY or BOTTOM.

leastUpperBound

public AliasStatus leastUpperBound(AliasStatus other)

mightBeAlias

public boolean mightBeAlias()

Returns true if this is DEFINITELY or MAYBE.

valueOf

public static AliasStatus valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

values

public static AliasStatus[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (AliasStatus c : AliasStatus.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared