1 files changed, 0 insertions, 99 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeFilter.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeFilter.cs
deleted file mode 100644
index ba44e2d..0000000
--- a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeFilter.cs
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * [The "BSD licence"]
- * Copyright (c) 2005-2008 Terence Parr
- * All rights reserved.
- *
- * Conversion to C#:
- * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
- * 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.
- */
-
-namespace Antlr.Runtime.Tree
-{
-    using Antlr.Runtime.Misc;
-
-    public class TreeFilter : TreeParser
-    {
-        protected ITokenStream originalTokenStream;
-        protected ITreeAdaptor originalAdaptor;
-
-        public TreeFilter( ITreeNodeStream input )
-            : this( input, new RecognizerSharedState() )
-        {
-        }
-        public TreeFilter( ITreeNodeStream input, RecognizerSharedState state )
-            : base( input, state )
-        {
-            originalAdaptor = input.TreeAdaptor;
-            originalTokenStream = input.TokenStream;
-        }
-
-        public virtual void ApplyOnce( object t, Action whichRule )
-        {
-            if ( t == null )
-                return;
-
-            try
-            {
-                // share TreeParser object but not parsing-related state
-                SetState(new RecognizerSharedState());
-                SetTreeNodeStream(new CommonTreeNodeStream(originalAdaptor, t));
-                ( (CommonTreeNodeStream)input ).TokenStream = originalTokenStream;
-                BacktrackingLevel = 1;
-                whichRule();
-                BacktrackingLevel = 0;
-            }
-            catch ( RecognitionException )
-            {
-            }
-        }
-
-        public virtual void Downup( object t )
-        {
-            TreeVisitor v = new TreeVisitor( new CommonTreeAdaptor() );
-            Func<object, object> pre = ( o ) =>
-            {
-                ApplyOnce( o, Topdown );
-                return o;
-            };
-            Func<object, object> post = ( o ) =>
-            {
-                ApplyOnce( o, Bottomup );
-                return o;
-            };
-            v.Visit( t, pre, post );
-        }
-
-        // methods the downup strategy uses to do the up and down rules.
-        // to override, just define tree grammar rule topdown and turn on
-        // filter=true.
-        protected virtual void Topdown()
-        {
-        }
-        protected virtual void Bottomup()
-        {
-        }
-    }
-}