AbsentToken

java.lang.Object
- ptolemy.data.Token
- - ptolemy.data.AbsentToken

```
public class AbsentToken
extends Token
```
A placeholder token that represents the absence of a token.

Since:

Ptolemy II 8.0

Version:

$Id$

Author:

Paul Whitaker

Pt.AcceptedRating:

Red (pwhitake)

Pt.ProposedRating:

Red (pwhitake)

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  static AbsentToken ABSENT
  An instance of an absent token.
  - Fields inherited from class ptolemy.data.Token
    NIL
- Constructor Summary
  
  Constructors
  Constructor Description
  
  AbsentToken()
  Construct a token with value false.
- Method Summary
  - Methods inherited from class ptolemy.data.Token
    add, addReverse, divide, divideReverse, getType, isCloseTo, isCloseTo, isEqualTo, isNil, modulo, moduloReverse, multiply, multiplyReverse, notSupportedConversionMessage, notSupportedIncomparableConversionMessage, notSupportedIncomparableMessage, notSupportedMessage, notSupportedNullNilStringMessage, one, pow, subtract, subtractReverse, toString, zero, zeroReturnType
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - ABSENT
```
public static final AbsentToken ABSENT
```
    An instance of an absent token.
- Constructor Detail
  - AbsentToken
```
public AbsentToken()
```
    Construct a token with value false.