orc.runtime.values
Class Constant

java.lang.Object
  orc.runtime.values.Value
      orc.runtime.values.Constant

All Implemented Interfaces:

Future

public class Constant
extends Value

A value container for an arbitrary Java object, which includes Orc literal atomic values.

This has overrides to support treating collections and arrays as lists (i.e. list pattern matches will work on them).

FIXME: how well does this cope with Java nulls?

Author:

wcook, dkitchin, quark

Constructor Summary

Constant(java.lang.Object value)

Method Summary

<E> E	accept(Visitor<E> visitor)
Callable	forceCall(Token t) A Java value used in call position becomes a proxied object.
java.lang.Object	getValue()
Value	head() Return the head value of a cons-like data structure.
boolean	isCons()
boolean	isNil()
Value	tail() Return the tail value of a cons-like data structure.
java.lang.String	toString()

Methods inherited from class orc.runtime.values.Value

forceArg, isNone, isSome, signal, untag

Methods inherited from class java.lang.Object

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

Constructor Detail

Constant

public Constant(java.lang.Object value)

Method Detail

getValue

public java.lang.Object getValue()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

forceCall

public Callable forceCall(Token t)

A Java value used in call position becomes a proxied object.

Specified by:

forceCall in interface Future

Overrides:

forceCall in class Value

head

public Value head()

Description copied from class: Value

Return the head value of a cons-like data structure. This method must throw an exception iff isCons() returns false.

Overrides:

head in class Value

tail

public Value tail()

Description copied from class: Value

Return the tail value of a cons-like data structure. This method must throw an exception iff isCons() returns false.

Overrides:

tail in class Value

isCons

public boolean isCons()

Overrides:

isCons in class Value

isNil

public boolean isNil()

Overrides:

isNil in class Value

accept

public <E> E accept(Visitor<E> visitor)

Specified by:

accept in class Value