Fixed code completion bug.

ICSharpCode.NRefactory.CSharp/Completion/CSharpCompletionEngine.cs

@@ -2062,13 +2062,14 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 			} else {
 				memberLocation = location;
 			}
-			var baseUnit = ParseStub ("");
+			var baseUnit = ParseStub ("a");
 			var tmpUnit = baseUnit;
-			AstNode expr = baseUnit.GetNodeAt<IdentifierExpression> (location.Line, location.Column - 1);
-			if (expr == null)
-				expr = baseUnit.GetNodeAt<Attribute> (location.Line, location.Column - 1);
-			if (expr == null)
+			AstNode expr = baseUnit.GetNodeAt (location, n => n is IdentifierExpression || n is MemberReferenceExpression);
+			if (expr == null) {
 				expr = baseUnit.GetNodeAt<AstType> (location.Line, location.Column - 1);
+				if (expr is AstType && expr.Parent is Attribute)
+					expr = expr.Parent;
+			}
 			
 			// try insertStatement
 			if (expr == null && baseUnit.GetNodeAt<EmptyStatement> (location.Line, location.Column) != null) {
@@ -2139,7 +2140,9 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 				if (expr != null)
 					expr = baseUnit.GetNodeAt<Expression> (location.Line, location.Column) ?? expr; 
 				if (expr == null)
-					expr = baseUnit.GetNodeAt<Attribute> (location.Line, location.Column); 
+					expr = baseUnit.GetNodeAt<AstType> (location.Line, location.Column); 
+				if (expr is AstType && expr.Parent is Attribute)
+					expr = expr.Parent;
 			}
 			if (expr == null)
 				return null;

ICSharpCode.NRefactory.Tests/CSharp/CodeCompletion/CodeCompletionBugTests.cs

@@ -4545,5 +4545,40 @@ class Test
 			Assert.IsNotNull (provider.Find ("Value2"), "field 'Value2' not found.");
 		}
 		
+		/// <summary>
+		/// Bug 3581 - [New Resolver] No code completion on Attributes
+		/// </summary>
+		[Test()]
+		public void TestBug3581 ()
+		{
+			CompletionDataList provider = CreateProvider (
+@"using System;
+
+namespace Foobar
+{
+	class Intent 
+	{
+		public static int Foo = 0;
+		public static int Bar = 1;
+	}
+	
+	class MyAttribute : Attribute
+	{
+		public int[] Categories;
+	}
+	
+	[MyAttribute(Categories = new [] { $I$ })]
+	class MainClass
+	{
+		public static void Main (string[] args)
+		{
+			Console.WriteLine (ddsd);
+		}
+	}
+}
+
+");
+			Assert.IsNotNull (provider.Find ("Intent"), "'Intent' not found.");
+		}
 	}
 }