Improved completion of enums.

ICSharpCode.NRefactory.CSharp/Completion/CSharpCompletionEngine.cs

@@ -741,6 +741,24 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 			
 			AddKeywords (wrapper, primitiveTypesKeywords);
 			wrapper.Result.AddRange (factory.CreateCodeTemplateCompletionData ());
+			
+			if (node.Role == AstNode.Roles.Argument) {
+				var resolved = ResolveExpression (CSharpParsedFile, node.Parent, Unit);
+				var invokeResult = resolved != null ? resolved.Item1 as CSharpInvocationResolveResult : null;
+				if (invokeResult != null) {
+					int argNum = 0;
+					foreach (var arg in node.Parent.Children.Where (c => c.Role == AstNode.Roles.Argument)) {
+						if (arg == node)
+							break;
+						argNum++;
+					}
+					var param = argNum < invokeResult.Member.Parameters.Count ? invokeResult.Member.Parameters [argNum] : null;
+					if (param != null && param.Type.Kind == TypeKind.Enum) {
+						AddEnumMembers (wrapper, param.Type, state);
+					}
+				}
+			}
+			
 		}
 		
 		static bool IsInSwitchContext (AstNode node)

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

@@ -428,7 +428,27 @@ namespace ThisOne {
 			Assert.IsNotNull (provider);
 			Assert.IsNotNull (provider.Find ("Other.TheEnum"), "Other.TheEnum not found.");
 		}
+		
+		[Test()]
+		public void TestInnerEnum ()
+		{
+			var provider = CreateProvider (
+@"class Other { 
+	public enum TheEnum { One, Two }
+	public Other (TheEnum e) { }
+}
+
+public class Test {
+	public void TestMethod () {
+		$new Other (O$
+	}
+}");
+			Assert.IsNotNull (provider);
+			Assert.IsNotNull (provider.Find ("Other.TheEnum"), "'Other.TheEnum' not found.");
+		}
 
+		
+		
 		/// <summary>
 		/// Bug 318834 - autocompletion kicks in when inputting decimals
 		/// </summary>