Implemented invert condition function.

ICSharpCode.NRefactory/CSharp/Ast/CSharpUtil.cs

@@ -0,0 +1,95 @@
+// 
+// CSharpUtil.cs
+//  
+// Author:
+//       Mike Krüger <mkrueger@novell.com>
+// 
+// Copyright (c) 2011 Novell, Inc (http://www.novell.com)
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using ICSharpCode.NRefactory.CSharp;
+
+namespace ICSharpCode.NRefactory.CSharp
+{
+	public static class CSharpUtil
+	{
+		public static Expression InvertCondition (Expression condition)
+		{
+			return InvertConditionInternal (condition.Clone ());
+		}
+		
+		static Expression InvertConditionInternal (Expression condition)
+		{
+			if (condition is ParenthesizedExpression) {
+				((ParenthesizedExpression)condition).Expression = InvertCondition (((ParenthesizedExpression)condition).Expression);
+				return condition;
+			}
+			
+			if (condition is UnaryOperatorExpression) {
+				var uOp = (UnaryOperatorExpression)condition;
+				if (uOp.Operator == UnaryOperatorType.Not)
+					return uOp.Expression;
+				return new UnaryOperatorExpression (UnaryOperatorType.Not, uOp);
+			}
+			
+			if (condition is BinaryOperatorExpression) {
+				var bOp = (BinaryOperatorExpression)condition;
+				switch (bOp.Operator) {
+				case BinaryOperatorType.GreaterThan:
+					bOp.Operator = BinaryOperatorType.LessThanOrEqual;
+					return bOp;
+				case BinaryOperatorType.GreaterThanOrEqual:
+					bOp.Operator = BinaryOperatorType.LessThan;
+					return bOp;
+				case BinaryOperatorType.Equality:
+					bOp.Operator = BinaryOperatorType.InEquality;
+					return bOp;
+				case BinaryOperatorType.InEquality:
+					bOp.Operator = BinaryOperatorType.Equality;
+					return bOp;
+				case BinaryOperatorType.LessThan:
+					bOp.Operator = BinaryOperatorType.GreaterThanOrEqual;
+					return bOp;
+				case BinaryOperatorType.LessThanOrEqual:
+					bOp.Operator = BinaryOperatorType.GreaterThan;
+					return bOp;
+				default:
+					return new UnaryOperatorExpression (UnaryOperatorType.Not, new ParenthesizedExpression (condition));
+				}
+			}
+			
+			if (condition is ConditionalExpression) {
+				var cEx = condition as ConditionalExpression;
+				cEx.Condition = InvertCondition (cEx.Condition);
+				return cEx;
+			}
+			if (condition is PrimitiveExpression) {
+				var pex = condition as PrimitiveExpression;
+				if (pex.Value is bool) {
+					pex.Value = !((bool)pex.Value);
+					return pex; 
+				}
+			}
+			
+			return new UnaryOperatorExpression (UnaryOperatorType.Not, condition);
+		}
+	}
+}
+

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

@@ -49,7 +49,7 @@ namespace ICSharpCode.NRefactory.CSharp
 		
 		public object Value {
 			get;
-			private set;
+			set;
 		}
 		
 		public PrimitiveExpression (object value)

ICSharpCode.NRefactory/ICSharpCode.NRefactory.csproj

@@ -357,6 +357,7 @@
     <Compile Include="CSharp\Ast\Expressions\UndocumentedExpression.cs" />
     <Compile Include="CSharp\Ast\IRelocatable.cs" />
     <Compile Include="CSharp\Ast\ObservableAstVisitor.cs" />
+    <Compile Include="CSharp\Ast\CSharpUtil.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="CSharp\" />