C# parser bugfix: casts to non-builtin nullable types

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1144 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/NRefactory/Project/Src/Parser/CSharp/cs.ATG

@@ -140,6 +140,9 @@ bool IsTypeNameForTypeCast(ref Token pt)
 		}
 		pt = Peek();
 	}
+	if (pt.kind == Tokens.Question) {
+		pt = Peek();
+	}
 	if (pt.kind == Tokens.Times || pt.kind == Tokens.OpenSquareBracket) {
 		return IsPointerOrDims(ref pt);
 	}

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

@@ -37,7 +37,7 @@ namespace ICSharpCode.NRefactory.Tests.AST
 		}
 		
 		[Test]
-		public void NullableCastExpression()
+		public void NullablePrimitiveCastExpression()
 		{
 			CastExpression ce = ParseUtilCSharp.ParseExpression<CastExpression>("(int?)o");
 			Assert.AreEqual("System.Nullable", ce.CastTo.SystemType);
@@ -46,6 +46,16 @@ namespace ICSharpCode.NRefactory.Tests.AST
 			Assert.AreEqual(CastType.Cast, ce.CastType);
 		}
 		
+		[Test]
+		public void NullableCastExpression()
+		{
+			CastExpression ce = ParseUtilCSharp.ParseExpression<CastExpression>("(MyType?)o");
+			Assert.AreEqual("System.Nullable", ce.CastTo.SystemType);
+			Assert.AreEqual("MyType", ce.CastTo.GenericTypes[0].Type);
+			Assert.IsTrue(ce.Expression is IdentifierExpression);
+			Assert.AreEqual(CastType.Cast, ce.CastType);
+		}
+		
 		[Test]
 		public void NullableTryCastExpression()
 		{