Package org.antlr.runtime.tree

Class RewriteRuleNodeStream

java.lang.Object

org.antlr.runtime.tree.RewriteRuleElementStream

org.antlr.runtime.tree.RewriteRuleNodeStream

public class RewriteRuleNodeStream
extends RewriteRuleElementStream

Queues up nodes matched on left side of -> in a tree parser. This is the analog of RewriteRuleTokenStream for normal parsers.

Field Summary

Fields inherited from class org.antlr.runtime.tree.RewriteRuleElementStream

adaptor, cursor, dirty, elementDescription, elements, singleElement

Constructor Summary

Constructors

Constructor	Description
RewriteRuleNodeStream(TreeAdaptor adaptor, String elementDescription)
RewriteRuleNodeStream(TreeAdaptor adaptor, String elementDescription, Object oneElement)	Create a stream with one element
RewriteRuleNodeStream(TreeAdaptor adaptor, String elementDescription, List<Object> elements)	Create a stream, but feed off an existing list

Method Summary

Modifier and Type	Method	Description
protected Object	dup(Object el)	When constructing trees, sometimes we need to dup a token or AST subtree.
Object	nextNode()
protected Object	toTree(Object el)	Ensure stream emits trees; tokens must be converted to AST nodes.

Methods inherited from class java.lang.Object

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

Methods inherited from class org.antlr.runtime.tree.RewriteRuleElementStream

_next, add, getDescription, hasNext, nextTree, reset, size

Constructor Detail

RewriteRuleNodeStream

public RewriteRuleNodeStream(TreeAdaptor adaptor,
                             String elementDescription)

RewriteRuleNodeStream

public RewriteRuleNodeStream(TreeAdaptor adaptor,
                             String elementDescription,
                             Object oneElement)

Create a stream with one element

RewriteRuleNodeStream

public RewriteRuleNodeStream(TreeAdaptor adaptor,
                             String elementDescription,
                             List<Object> elements)

Create a stream, but feed off an existing list

Method Detail

nextNode

public Object nextNode()

toTree

protected Object toTree(Object el)

Description copied from class: RewriteRuleElementStream

Ensure stream emits trees; tokens must be converted to AST nodes. AST nodes can be passed through unmolested.

Overrides:

toTree in class RewriteRuleElementStream

dup

protected Object dup(Object el)

Description copied from class: RewriteRuleElementStream

When constructing trees, sometimes we need to dup a token or AST subtree. Dup'ing a token means just creating another AST node around it. For trees, you must call the adaptor.dupTree() unless the element is for a tree root; then it must be a node dup.

Specified by:

dup in class RewriteRuleElementStream