[Completion] Fixed completion bug.

ICSharpCode.NRefactory.CSharp/Completion/CSharpCompletionEngine.cs

@@ -1113,12 +1113,16 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 					location.Line,
 					location.Column + 2,
 					n => n is Expression || n is AstType || n is NamespaceDeclaration
-					);
+				);
 				rr = ResolveExpression(node);
 			}
 			// namespace name case
-			if (node is NamespaceDeclaration)
-				return null;
+			var ns = node as NamespaceDeclaration;
+			if (ns != null) {
+				var last = ns.Identifiers.LastOrDefault ();
+				if (last != null && location < last.EndLocation)
+					return null;
+			}
 			if (node is Identifier && node.Parent is ForeachStatement) {
 				var foreachStmt = (ForeachStatement)node.Parent;
 				foreach (var possibleName in GenerateNameProposals (foreachStmt.VariableType)) {
@@ -1228,7 +1232,7 @@ namespace ICSharpCode.NRefactory.CSharp.Completion
 					return t.GetAllBaseTypeDefinitions().Any(bt => bt.Equals(attribute)) ? t : null;
 				};
 			}
-			if (node != null || state.CurrentTypeDefinition != null || isInGlobalDelegate) {
+			if (node != null && !(node is NamespaceDeclaration) || state.CurrentTypeDefinition != null || isInGlobalDelegate) {
 				AddTypesAndNamespaces(wrapper, state, node, typePred);
 				
 				wrapper.Result.Add(factory.CreateLiteralCompletionData("global"));

ICSharpCode.NRefactory.CSharp/Parser/CSharpParser.cs

@@ -405,15 +405,17 @@ namespace ICSharpCode.NRefactory.CSharp
 				AstNode insertPos = null;
 				while (memberName != null) {
 					Identifier newIdent = Identifier.Create (memberName.Name, Convert (memberName.Location));
-					namespaceDecl.InsertChildBefore (insertPos, newIdent, Roles.Identifier);
-					insertPos = newIdent;
-					
-					if (!memberName.DotLocation.IsNull) {
-						var dotToken = new CSharpTokenNode (Convert (memberName.DotLocation), Roles.Dot);
-						namespaceDecl.InsertChildBefore (insertPos, dotToken, Roles.Dot);
-						insertPos = dotToken;
+					// HACK for a parser 'bug' - sometimes it generates "<invalid>" identifiers in namespace names (on certain bugs in the input file)
+					if (newIdent.Name != "<invalid>") {
+						namespaceDecl.InsertChildBefore (insertPos, newIdent, Roles.Identifier);
+						insertPos = newIdent;
+						
+						if (!memberName.DotLocation.IsNull) {
+							var dotToken = new CSharpTokenNode (Convert (memberName.DotLocation), Roles.Dot);
+							namespaceDecl.InsertChildBefore (insertPos, dotToken, Roles.Dot);
+							insertPos = dotToken;
+						}
 					}
-					
 					memberName = memberName.Left;
 				}
 			}

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

@@ -1421,5 +1421,28 @@ namespace ConsoleApplication2
 				Assert.AreEqual (1, count);
 			});
 		}
+
+
+		/// <summary>
+		/// Bug 5648 - Types are displayed even when cannot be used 
+		/// </summary>
+		[Test()]
+		public void TestBug5648 ()
+		{
+			CodeCompletionBugTests.CombinedProviderTest (@"
+using System;
+
+namespace N
+{
+	$e$
+}
+", provider => {
+				Assert.IsNotNull (provider.Find ("enum"), "'enum' not found.");
+				Assert.IsNotNull (provider.Find ("namespace"), "'namespace' not found.");
+				Assert.IsNotNull (provider.Find ("public"), "'public' not found.");
+				Assert.IsNull (provider.Find ("CharEnumerator"), "'CharEnumerator' found.");
+				Assert.IsNull (provider.Find ("Console"), "'Console' found.");
+			});
+		}
 	}
 }