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diff --git a/runtime/ObjC/Framework/ANTLRUnbufferedCommonTreeNodeStream.h b/runtime/ObjC/Framework/ANTLRUnbufferedCommonTreeNodeStream.h
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+++ b/runtime/ObjC/Framework/ANTLRUnbufferedCommonTreeNodeStream.h
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+// [The "BSD licence"]
+// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. The name of the author may not be used to endorse or promote products
+//    derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+#import <Cocoa/Cocoa.h>
+#import "ANTLRTreeNodeStream.h"
+#import "ANTLRCommonTokenStream.h"
+#import "ANTLRCommonTree.h"
+#import "ANTLRCommonTreeAdaptor.h"
+
+@interface ANTLRUnbufferedCommonTreeNodeStream : NSObject < ANTLRTreeNodeStream > {
+
+	BOOL shouldUseUniqueNavigationNodes;
+
+	ANTLRCommonTree *root;
+	ANTLRCommonTree *currentNode;
+	ANTLRCommonTree *previousNode;
+
+	id<ANTLRTreeAdaptor> treeAdaptor;
+	
+	id<ANTLRTokenStream> tokenStream;
+	
+	NSMutableArray *nodeStack;
+	NSMutableArray *indexStack;
+	ANTLRPtrBuffer *markers;
+	NSInteger lastMarker;
+	
+	NSInteger currentChildIndex;
+	NSInteger absoluteNodeIndex;
+	
+	NSMutableArray *lookahead;
+	NSUInteger head;
+	NSUInteger tail;
+}
+
+@property (retain, getter=getRoot, setter=setRoot:) ANTLRCommonTree *root;
+@property (retain, getter=getCurrentNode, setter=setCurrentNode:) ANTLRCommonTree *currentNode;
+@property (retain, getter=getPreviousNode, setter=setPreviousNode:) ANTLRCommonTree *previousNode;
+@property (retain, getter=getTreeAdaptor, setter=setTreeAdaptor:) id<ANTLRTreeAdaptor> treeAdaptor;
+@property (retain, getter=getTokenStream, setter=setTokenStream:) id<ANTLRTokenStream> tokenStream;
+@property (retain, getter=getNodeStack, setter=setNodeStack:) NSMutableArray *nodeStack;
+@property (retain, getter=getIndexStack, setter=setIndexStackStack:) NSMutableArray *indexStack;
+@property (retain, getter=getMarkers, setter=setMarkers:) ANTLRPtrBuffer *markers;
+@property (assign, getter=getLastMarker, setter=setLastMarker:) NSInteger lastMarker;
+@property (assign, getter=getCurrentChildIndex, setter=setCurrentChildIndex:) NSInteger currentChildIndex;
+@property (assign, getter=getAbsoluteNodeIndex, setter=setAbsoluteNodeIndex:) NSInteger absoluteNodeIndex;
+@property (retain, getter=getLookahead, setter=setLookahead:) NSMutableArray *lookahead;
+@property (assign, getter=getHead, setter=setHead:) NSUInteger head;
+@property (assign, getter=getTail, setter=setTail:) NSUInteger tail;
+
+- (id) initWithTree:(ANTLRCommonTree *)theTree;
+- (id) initWithTree:(ANTLRCommonTree *)theTree treeAdaptor:(ANTLRCommonTreeAdaptor *)theAdaptor;
+
+- (void) reset;
+
+#pragma mark ANTLRTreeNodeStream conformance
+
+- (id) LT:(NSInteger)k;
+- (id) treeSource;
+- (id<ANTLRTreeAdaptor>) getTreeAdaptor;
+- (void)setTreeAdaptor:(id<ANTLRTreeAdaptor>)aTreeAdaptor;
+- (id<ANTLRTokenStream>) getTokenStream;
+- (void) setTokenStream:(id<ANTLRTokenStream>)aTokenStream;	///< Added by subclass, not in protocol
+- (void) setUsesUniqueNavigationNodes:(BOOL)flag;
+
+- (id) nodeAtIndex:(NSUInteger) idx;
+
+- (NSString *) toString;
+- (NSString *) toStringWithRange:(NSRange) aRange;
+- (NSString *) toStringFromNode:(id)startNode toNode:(id)stopNode;
+
+#pragma mark ANTLRIntStream conformance
+- (void) consume;
+- (NSInteger) LA:(NSUInteger) i;
+- (NSUInteger) mark;
+- (NSUInteger) getIndex;
+- (void) rewind:(NSUInteger) marker;
+- (void) rewind;
+- (void) release:(NSUInteger) marker;
+- (void) seek:(NSUInteger) index;
+- (NSUInteger) size;
+
+#pragma mark Lookahead Handling
+- (void) addLookahead:(id<ANTLRBaseTree>)aNode;
+- (NSUInteger) lookaheadSize;
+- (void) fillBufferWithLookahead:(NSInteger)k;
+- (id) nextObject;
+
+#pragma mark Node visiting
+- (ANTLRCommonTree *) handleRootNode;
+- (ANTLRCommonTree *) visitChild:(NSInteger)childNumber;
+- (void) walkBackToMostRecentNodeWithUnvisitedChildren;
+- (void) addNavigationNodeWithType:(NSInteger)tokenType;
+
+#pragma mark Accessors
+- (ANTLRCommonTree *) root;
+- (void) setRoot: (ANTLRCommonTree *) aRoot;
+
+@end