CSharpOutputVisitor is now using the IAstVisitor with void return type.

Removed default value for 'data' on AcceptVisitor() methods.

ICSharpCode.NRefactory.CSharp/Ast/AstNode.cs

@@ -61,7 +61,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -102,7 +102,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder (this, child);
 			}
 
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder (this, child, data);
 			}
@@ -498,7 +498,7 @@ namespace ICSharpCode.NRefactory.CSharp
 		
 		public abstract T AcceptVisitor<T> (IAstVisitor<T> visitor);
 		
-		public abstract S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T));
+		public abstract S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data);
 		
 		#region Pattern Matching
 		protected static bool MatchString (string pattern, string text)
@@ -659,7 +659,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			if (IsNull)
 				return "";
 			var w = new StringWriter ();
-			AcceptVisitor (new CSharpOutputVisitor (w, formattingOptions ?? new CSharpFormattingOptions ()), null);
+			AcceptVisitor (new CSharpOutputVisitor (w, formattingOptions ?? new CSharpFormattingOptions ()));
 			return w.ToString ();
 		}
 		
@@ -684,9 +684,8 @@ namespace ICSharpCode.NRefactory.CSharp
 		{
 			if (IsNull)
 				return "Null";
-			StringWriter w = new StringWriter();
-			AcceptVisitor(new CSharpOutputVisitor(w, new CSharpFormattingOptions()), null);
-			string text = w.ToString().TrimEnd().Replace("\t", "").Replace(w.NewLine, " ");
+			string text = GetText();
+			text = text.TrimEnd().Replace("\t", "").Replace(Environment.NewLine, " ");
 			if (text.Length > 100)
 				return text.Substring(0, 97) + "...";
 			else

ICSharpCode.NRefactory.CSharp/Ast/AstType.cs

@@ -48,7 +48,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -94,7 +94,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder (this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder (this, child, data);
 			}

ICSharpCode.NRefactory.CSharp/Ast/CSharpTokenNode.cs

@@ -57,7 +57,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -124,7 +124,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCSharpTokenNode (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCSharpTokenNode (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/CompilationUnit.cs

@@ -104,7 +104,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCompilationUnit (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCompilationUnit (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/ComposedType.cs

@@ -84,7 +84,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitComposedType (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitComposedType (this, data);
 		}
@@ -196,7 +196,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitArraySpecifier (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitArraySpecifier(this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/ErrorNode.cs

@@ -67,7 +67,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return default (T);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			// nothing
 			return default (S);

ICSharpCode.NRefactory.CSharp/Ast/Expressions/AnonymousMethodExpression.cs

@@ -93,7 +93,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAnonymousMethodExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAnonymousMethodExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/AnonymousTypeCreateExpression.cs

@@ -76,7 +76,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAnonymousTypeCreateExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAnonymousTypeCreateExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ArrayCreateExpression.cs

@@ -66,7 +66,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitArrayCreateExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitArrayCreateExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ArrayInitializerExpression.cs

@@ -67,7 +67,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -101,7 +101,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitArrayInitializerExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitArrayInitializerExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/AsExpression.cs

@@ -67,7 +67,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAsExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAsExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/AssignmentExpression.cs

@@ -96,7 +96,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAssignmentExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAssignmentExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/BaseReferenceExpression.cs

@@ -57,7 +57,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitBaseReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitBaseReferenceExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/BinaryOperatorExpression.cs

@@ -97,7 +97,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitBinaryOperatorExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitBinaryOperatorExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/CastExpression.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCastExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCastExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/CheckedExpression.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCheckedExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCheckedExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ConditionalExpression.cs

@@ -81,7 +81,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitConditionalExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitConditionalExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/DefaultValueExpression.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitDefaultValueExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitDefaultValueExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/DirectionExpression.cs

@@ -75,7 +75,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitDirectionExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitDirectionExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/EmptyExpression.cs

@@ -72,7 +72,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitEmptyExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitEmptyExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ErrorExpression.cs

@@ -1,4 +1,4 @@
-// 
+// 
 // ErrorExpression.cs
 //  
 // Author:
@@ -63,7 +63,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return default (T);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			// nothing
 			return default(S);

ICSharpCode.NRefactory.CSharp/Ast/Expressions/Expression.cs

@@ -50,7 +50,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -91,7 +91,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder(this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/IdentifierExpression.cs

@@ -70,7 +70,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIdentifierExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIdentifierExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/IndexerExpression.cs

@@ -78,7 +78,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIndexerExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIndexerExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/InvocationExpression.cs

@@ -60,7 +60,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitInvocationExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitInvocationExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/IsExpression.cs

@@ -57,7 +57,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIsExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIsExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/LambdaExpression.cs

@@ -62,7 +62,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitLambdaExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitLambdaExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/MemberReferenceExpression.cs

@@ -97,7 +97,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitMemberReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitMemberReferenceExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/NamedArgumentExpression.cs

@@ -73,7 +73,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitNamedArgumentExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitNamedArgumentExpression(this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/NamedExpression.cs

@@ -83,7 +83,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitNamedExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitNamedExpression(this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/NullReferenceExpression.cs

@@ -63,7 +63,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitNullReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitNullReferenceExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ObjectCreateExpression.cs

@@ -90,7 +90,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitObjectCreateExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitObjectCreateExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ParenthesizedExpression.cs

@@ -63,7 +63,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitParenthesizedExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitParenthesizedExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/PointerReferenceExpression.cs

@@ -67,7 +67,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitPointerReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitPointerReferenceExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/PrimitiveExpression.cs

@@ -93,7 +93,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitPrimitiveExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitPrimitiveExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/QueryExpression.cs

@@ -45,7 +45,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 		
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -71,7 +71,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryExpression (this, data);
 		}
@@ -141,7 +141,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryContinuationClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryContinuationClause (this, data);
 		}
@@ -191,7 +191,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryFromClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryFromClause (this, data);
 		}
@@ -244,7 +244,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryLetClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryLetClause (this, data);
 		}
@@ -280,7 +280,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryWhereClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryWhereClause (this, data);
 		}
@@ -389,7 +389,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryJoinClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryJoinClause (this, data);
 		}
@@ -428,7 +428,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryOrderClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryOrderClause (this, data);
 		}
@@ -473,7 +473,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryOrdering (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryOrdering (this, data);
 		}
@@ -515,7 +515,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQuerySelectClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQuerySelectClause (this, data);
 		}
@@ -562,7 +562,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitQueryGroupClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitQueryGroupClause (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/SizeOfExpression.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitSizeOfExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitSizeOfExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/StackAllocExpression.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitStackAllocExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitStackAllocExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/ThisReferenceExpression.cs

@@ -57,7 +57,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitThisReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitThisReferenceExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/TypeOfExpression.cs

@@ -70,7 +70,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitTypeOfExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitTypeOfExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/TypeReferenceExpression.cs

@@ -41,7 +41,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitTypeReferenceExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitTypeReferenceExpression(this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/UnaryOperatorExpression.cs

@@ -78,7 +78,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUnaryOperatorExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUnaryOperatorExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/UncheckedExpression.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUncheckedExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUncheckedExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Expressions/UndocumentedExpression.cs

@@ -90,7 +90,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUndocumentedExpression (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUndocumentedExpression (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/Attribute.cs

@@ -64,7 +64,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAttribute (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAttribute (this, data);
 		}
@@ -79,9 +79,8 @@ namespace ICSharpCode.NRefactory.CSharp
 		{
 			if (IsNull)
 				return "Null";
-			var w = new System.IO.StringWriter ();
-			AcceptVisitor (new CSharpOutputVisitor (w, new CSharpFormattingOptions ()), null);
-			return w.ToString ();
+			else
+				return GetText();
 		}
 	}
 }

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/AttributeSection.cs

@@ -64,7 +64,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder (this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}
@@ -130,7 +130,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAttributeSection (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAttributeSection (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/Comment.cs

@@ -119,7 +119,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitComment (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitComment (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/Constraint.cs

@@ -70,7 +70,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitConstraint (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitConstraint (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/DelegateDeclaration.cs

@@ -99,7 +99,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitDelegateDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitDelegateDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/ExternAliasDeclaration.cs

@@ -80,7 +80,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitExternAliasDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitExternAliasDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/NamespaceDeclaration.cs

@@ -125,7 +125,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitNamespaceDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitNamespaceDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/PreProcessorDirective.cs

@@ -112,7 +112,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitPreProcessorDirective (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitPreProcessorDirective (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/TypeDeclaration.cs

@@ -115,7 +115,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitTypeDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitTypeDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/TypeParameterDeclaration.cs

@@ -74,7 +74,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitTypeParameterDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitTypeParameterDeclaration(this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/UsingAliasDeclaration.cs

@@ -93,7 +93,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUsingAliasDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUsingAliasDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/GeneralScope/UsingDeclaration.cs

@@ -85,7 +85,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUsingDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUsingDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Identifier.cs

@@ -48,7 +48,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -150,7 +150,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIdentifier (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIdentifier (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/MemberType.cs

@@ -99,7 +99,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitMemberType (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitMemberType (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/PrimitiveType.cs

@@ -85,7 +85,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitPrimitiveType (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitPrimitiveType (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/SimpleType.cs

@@ -56,7 +56,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -136,7 +136,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitSimpleType (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitSimpleType (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/BlockStatement.cs

@@ -54,7 +54,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -95,7 +95,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder(this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}
@@ -134,7 +134,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitBlockStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitBlockStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/BreakStatement.cs

@@ -51,7 +51,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitBreakStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitBreakStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/CheckedStatement.cs

@@ -61,7 +61,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCheckedStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCheckedStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ContinueStatement.cs

@@ -51,7 +51,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitContinueStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitContinueStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/DoWhileStatement.cs

@@ -74,7 +74,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitDoWhileStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitDoWhileStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/EmptyStatement.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitEmptyStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitEmptyStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ExpressionStatement.cs

@@ -50,7 +50,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitExpressionStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitExpressionStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/FixedStatement.cs

@@ -71,7 +71,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitFixedStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitFixedStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ForStatement.cs

@@ -82,7 +82,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitForStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitForStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ForeachStatement.cs

@@ -93,7 +93,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitForeachStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitForeachStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/GotoStatement.cs

@@ -72,7 +72,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitGotoStatement (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitGotoStatement (this, data);
 		}
@@ -122,7 +122,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitGotoCaseStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitGotoCaseStatement (this, data);
 		}
@@ -164,7 +164,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitGotoDefaultStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitGotoDefaultStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/IfElseStatement.cs

@@ -78,7 +78,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIfElseStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIfElseStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/LabelStatement.cs

@@ -54,7 +54,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitLabelStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitLabelStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/LockStatement.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitLockStatement (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitLockStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ReturnStatement.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitReturnStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitReturnStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/Statement.cs

@@ -34,7 +34,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -75,7 +75,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder(this, child);
 			}
 
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}

ICSharpCode.NRefactory.CSharp/Ast/Statements/SwitchStatement.cs

@@ -76,7 +76,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitSwitchStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitSwitchStatement (this, data);
 		}
@@ -119,7 +119,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder(this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}
@@ -162,7 +162,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitSwitchSection (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitSwitchSection (this, data);
 		}
@@ -212,7 +212,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCaseLabel (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCaseLabel (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/ThrowStatement.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitThrowStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitThrowStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/TryCatchStatement.cs

@@ -72,7 +72,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitTryCatchStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitTryCatchStatement (this, data);
 		}
@@ -120,7 +120,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder(this, child);
 			}
 
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}
@@ -194,7 +194,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCatchClause (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCatchClause (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/UncheckedStatement.cs

@@ -61,7 +61,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUncheckedStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUncheckedStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/UnsafeStatement.cs

@@ -52,7 +52,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUnsafeStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUnsafeStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/UsingStatement.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitUsingStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitUsingStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/VariableDeclarationStatement.cs

@@ -76,7 +76,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitVariableDeclarationStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitVariableDeclarationStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/WhileStatement.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitWhileStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitWhileStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/YieldBreakStatement.cs

@@ -56,7 +56,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitYieldBreakStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitYieldBreakStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/Statements/YieldReturnStatement.cs

@@ -61,7 +61,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitYieldReturnStatement (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitYieldReturnStatement (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/Accessor.cs

@@ -51,7 +51,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -81,7 +81,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitAccessor (this);
 		}
 		
-		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAccessor (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/ConstructorDeclaration.cs

@@ -85,7 +85,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitConstructorDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitConstructorDeclaration (this, data);
 		}
@@ -132,7 +132,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -176,7 +176,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitConstructorInitializer (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitConstructorInitializer (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/DestructorDeclaration.cs

@@ -72,7 +72,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitDestructorDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitDestructorDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/EnumMemberDeclaration.cs

@@ -68,7 +68,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitEnumMemberDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitEnumMemberDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/EventDeclaration.cs

@@ -55,7 +55,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitEventDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitEventDeclaration (this, data);
 		}
@@ -105,7 +105,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitCustomEventDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitCustomEventDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/FieldDeclaration.cs

@@ -54,7 +54,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitFieldDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitFieldDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/FixedFieldDeclaration.cs

@@ -59,7 +59,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitFixedFieldDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitFixedFieldDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/FixedVariableInitializer.cs

@@ -90,7 +90,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitFixedVariableInitializer (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitFixedVariableInitializer (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/IndexerDeclaration.cs

@@ -75,7 +75,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitIndexerDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitIndexerDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/MethodDeclaration.cs

@@ -73,7 +73,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitMethodDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitMethodDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/OperatorDeclaration.cs

@@ -240,7 +240,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitOperatorDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitOperatorDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/ParameterDeclaration.cs

@@ -99,7 +99,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitParameterDeclaration (this);
 		}
 
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitParameterDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/PropertyDeclaration.cs

@@ -61,7 +61,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitPropertyDeclaration (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitPropertyDeclaration (this, data);
 		}

ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/VariableInitializer.cs

@@ -48,7 +48,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return default (T);
 			}
 			
-			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 			{
 				return default (S);
 			}
@@ -89,7 +89,7 @@ namespace ICSharpCode.NRefactory.CSharp
 				return visitor.VisitPatternPlaceholder (this, child);
 			}
 			
-			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data = default(T))
+			public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 			{
 				return visitor.VisitPatternPlaceholder(this, child, data);
 			}
@@ -159,7 +159,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			return visitor.VisitVariableInitializer (this);
 		}
 		
-		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data = default(T))
+		public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitVariableInitializer (this, data);
 		}