Fixed conversion of "If(If(a,b,c),d,e)" from VB to C#.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@6064 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/NRefactory/Project/Src/PrettyPrinter/CSharp/CSharpOutputVisitor.cs

@@ -2903,7 +2903,11 @@ namespace ICSharpCode.NRefactory.PrettyPrinter
 		
 		public override object TrackedVisitConditionalExpression(ConditionalExpression conditionalExpression, object data)
 		{
-			TrackVisit(conditionalExpression.Condition, data);
+			if (conditionalExpression.Condition is ConditionalExpression) {
+				TrackedVisitParenthesizedExpression(new ParenthesizedExpression(conditionalExpression.Condition), data);
+			} else {
+				TrackVisit(conditionalExpression.Condition, data);
+			}
 			if (this.prettyPrintOptions.ConditionalOperatorBeforeConditionSpace) {
 				outputFormatter.Space();
 			}

src/Libraries/NRefactory/Test/Output/CSharp/VBNetToCSharpConverterTest.cs

@@ -778,5 +778,13 @@ static bool InitStaticVariableHelper(Microsoft.VisualBasic.CompilerServices.Stat
 		{
 			TestStatement("Dim x As Integer = CInt(obj)", "int x = Convert.ToInt32(obj);");
 		}
+		
+		[Test]
+		public void ConditionalExprPrecedence()
+		{
+			TestStatement("Dim x As Integer = If(If(a,b,c),d,e)", "int x = (a ? b : c) ? d : e;");
+			TestStatement("Dim x As Integer = If(a,If(b,c,d),e)", "int x = a ? b ? c : d : e;");
+			TestStatement("Dim x As Integer = If(a,b,If(c,d,e))", "int x = a ? b : c ? d : e;");
+		}
 	}
 }

src/Libraries/NRefactory/Test/Parser/Expressions/ConditionalExpressionTests.cs

@@ -88,6 +88,26 @@ namespace ICSharpCode.NRefactory.Tests.Ast
 			Assert.IsTrue(ce.TrueExpression is UnaryOperatorExpression);
 			Assert.IsTrue(ce.FalseExpression is PrimitiveExpression);
 		}
+		
+		[Test]
+		public void CSharpRepeatedConditionalExpr()
+		{
+			ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a ? b : c ? d : e");
+			
+			Assert.AreEqual("a", ((IdentifierExpression)ce.Condition).Identifier);
+			Assert.AreEqual("b", ((IdentifierExpression)ce.TrueExpression).Identifier);
+			Assert.IsTrue(ce.FalseExpression is ConditionalExpression);
+		}
+		
+		[Test]
+		public void CSharpNestedConditionalExpr()
+		{
+			ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a ? b ? c : d : e");
+			
+			Assert.AreEqual("a", ((IdentifierExpression)ce.Condition).Identifier);
+			Assert.AreEqual("e", ((IdentifierExpression)ce.FalseExpression).Identifier);
+			Assert.IsTrue(ce.TrueExpression is ConditionalExpression);
+		}
 		#endregion
 		
 		#region VB.NET