InsertParenthesesVisitor: insert parenthesis in "(new int[1])[0]"

ICSharpCode.NRefactory.Tests/CSharp/InsertParenthesesVisitorTests.cs

@@ -345,5 +345,38 @@ namespace ICSharpCode.NRefactory.CSharp
 			Assert.AreEqual("a && (b || c)", InsertRequired(expr));
 			Assert.AreEqual("a && (b || c)", InsertReadable(expr));
 		}
+		
+		[Test]
+		public void ArrayCreationInIndexer()
+		{
+			Expression expr = new IndexerExpression {
+				Target = new ArrayCreateExpression {
+					Type = new PrimitiveType("int"),
+					Arguments = { new PrimitiveExpression(1) }
+				},
+				Arguments = { new PrimitiveExpression(0) }
+			};
+			
+			Assert.AreEqual("(new int[1]) [0]", InsertRequired(expr));
+			Assert.AreEqual("(new int[1]) [0]", InsertReadable(expr));
+		}
+		
+		[Test]
+		public void ArrayCreationWithInitializerInIndexer()
+		{
+			Expression expr = new IndexerExpression {
+				Target = new ArrayCreateExpression {
+					Type = new PrimitiveType("int"),
+					Arguments = { new PrimitiveExpression(1) },
+					Initializer = new ArrayInitializerExpression {
+						Elements = { new PrimitiveExpression(42) }
+					}
+				},
+				Arguments = { new PrimitiveExpression(0) }
+			};
+			
+			Assert.AreEqual("new int[1] { 42 } [0]", InsertRequired(expr));
+			Assert.AreEqual("(new int[1] { 42 }) [0]", InsertReadable(expr));
+		}
 	}
 }

ICSharpCode.NRefactory/CSharp/OutputVisitor/InsertParenthesesVisitor.cs

@@ -132,6 +132,11 @@ namespace ICSharpCode.NRefactory.CSharp
 		public override object VisitIndexerExpression(IndexerExpression indexerExpression, object data)
 		{
 			ParenthesizeIfRequired(indexerExpression.Target, Primary);
+			ArrayCreateExpression ace = indexerExpression.Target as ArrayCreateExpression;
+			if (ace != null && (InsertParenthesesForReadability || ace.Initializer.IsNull)) {
+				// require parentheses for "(new int[1])[0]"
+				Parenthesize(indexerExpression.Target);
+			}
 			return base.VisitIndexerExpression(indexerExpression, data);
 		}