orc.ast.oil
Class Null

java.lang.Object
  orc.ast.oil.Expr
      orc.ast.oil.Null

public class Null
extends Expr

Constructor Summary

Null()

Method Summary

<E> E	accept(Visitor<E> visitor)
Node	compile(Node output) Compiles an oil syntax tree into an execution graph.
java.lang.String	toString()

Methods inherited from class orc.ast.oil.Expr

addIndices, compile, freeVars

Methods inherited from class java.lang.Object

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

Constructor Detail

Null

public Null()

Method Detail

compile

public Node compile(Node output)

Description copied from class: Expr

Compiles an oil syntax tree into an execution graph. Every node is compiled relative to an "output" node that represents the "rest of the program". Thus the tree of compiled nodes is created bottom up.

Specified by:

compile in class Expr

Parameters:

output - This is the node to which output (publications) will be directed.

Returns:

A new node.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

accept

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

Specified by:

accept in class Expr