Package org.jruby.ast

Class DVarNode

java.lang.Object

org.jruby.ast.Node

org.jruby.ast.DVarNode

All Implemented Interfaces:

IScopedNode, SideEffectFree, INameNode

public class DVarNode
extends Node
implements INameNode, IScopedNode, SideEffectFree

Access a dynamic variable (e.g. block scope local variable).

Field Summary

Fields inherited from class org.jruby.ast.Node

containsVariableAssignment, newline

Constructor Summary

Constructors

Constructor	Description
DVarNode(int line, int location, RubySymbol name)

Method Summary

Modifier and Type	Method	Description
<T> T	accept(NodeVisitor<T> iVisitor)	Accept for the visitor pattern.
List<Node>	childNodes()
int	getDepth()	How many scopes should we burrow down to until we need to set the block variable value.
int	getIndex()	Gets the index within the scope construct that actually holds the eval'd value of this local variable
RubySymbol	getName()	Gets the name.
NodeType	getNodeType()
boolean	needsDefinitionCheck()	Check whether the given node is considered always "defined" or whether it has some form of definition check.

Methods inherited from class org.jruby.ast.Node

containsVariableAssignment, createList, createList, createList, createList, executesOnce, getFile, getLine, getNodeName, isNewline, isNil, setLine, setNewline, toString, toString, toStringExtraInfo, toStringInternal, unsetNewline

Methods inherited from class java.lang.Object

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

Constructor Details

DVarNode

public DVarNode(int line,
 int location,
 RubySymbol name)

Method Details

getNodeType

public NodeType getNodeType()

Specified by:

getNodeType in class Node

Returns:

the nodeId

accept

public <T> T accept(NodeVisitor<T> iVisitor)

Accept for the visitor pattern.

Specified by:

accept in class Node

Parameters:

iVisitor - the visitor

getDepth

public int getDepth()

How many scopes should we burrow down to until we need to set the block variable value.

Specified by:

getDepth in interface IScopedNode

Returns:

0 for current scope, 1 for one down, ...

getIndex

public int getIndex()

Gets the index within the scope construct that actually holds the eval'd value of this local variable

Specified by:

getIndex in interface IScopedNode

Returns:

Returns an int offset into storage structure

getName

public RubySymbol getName()

Gets the name.

Specified by:

getName in interface INameNode

Returns:

Returns a String

childNodes

public List<Node> childNodes()

Specified by:

childNodes in class Node

needsDefinitionCheck

public boolean needsDefinitionCheck()

Description copied from class: Node

Check whether the given node is considered always "defined" or whether it has some form of definition check.

Overrides:

needsDefinitionCheck in class Node

Returns:

Whether the type of node represents a possibly undefined construct