Suggest only namespaces after 'using'.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3693 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Test/CSharpExpressionFinderTests.cs

@@ -1127,6 +1127,26 @@ class Main {
 				ef.FindFullExpression(program, i);
 			}
 		}
+		
+		[Test]
+		public void UsingNamespaceContext1()
+		{
+			const string program = @"using ";
+			
+			ExpressionResult result = ef.FindExpression(program, program.Length);
+			Assert.AreEqual(null, result.Expression);
+			Assert.AreEqual(ExpressionContext.Namespace, result.Context);
+		}
+		
+		[Test]
+		public void UsingNamespaceContext2()
+		{
+			const string program = @"using System";
+			
+			ExpressionResult result = ef.FindExpression(program, program.Length);
+			Assert.AreEqual("System", result.Expression);
+			Assert.AreEqual(ExpressionContext.Namespace, result.Context);
+		}
 	}
 }
 

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/CSharp/ExpressionFinder.cs

@@ -167,7 +167,11 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 			/// <summary>
 			/// After a keyword like "if","while","using" etc., but before the embedded statement.
 			/// </summary>
-			StatementWithEmbeddedStatement
+			StatementWithEmbeddedStatement,
+			/// <summary>
+			/// After "using" in global context, but before "=" or ";".
+			/// </summary>
+			UsingNamespace
 		}
 		
 		/// <summary>
@@ -219,6 +223,8 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 					}
 				} else if (state == FrameState.Constraints) {
 					SetContext(ExpressionContext.Constraints);
+				} else if (state == FrameState.UsingNamespace) {
+					SetContext(ExpressionContext.Namespace);
 				} else {
 					switch (type) {
 						case FrameType.Global:
@@ -533,12 +539,18 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 					frame.state = FrameState.Normal;
 					frame.ResetCurlyChildType();
 				}
+			} else if (frame.state == FrameState.UsingNamespace) {
+				if (token.kind != Tokens.Identifier && token.kind != Tokens.Dot && token.kind != Tokens.DoubleColon) {
+					frame.state = FrameState.Normal;
+					frame.SetDefaultContext();
+				}
 			}
 			
 			switch (token.kind) {
 				case Tokens.Using:
 					if (frame.type == FrameType.Global) {
-						frame.SetContext(ExpressionContext.Namespace);
+						frame.state = FrameState.UsingNamespace;
+						frame.SetDefaultContext();
 						break;
 					} else {
 						goto case Tokens.For;
@@ -730,7 +742,7 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 						           || frame.type == FrameType.Statements
 						           || frame.type == FrameType.Global)
 						{
-							if (!frame.context.IsObjectCreation) {
+							if (!frame.context.IsObjectCreation && frame.state != FrameState.UsingNamespace) {
 								frame.SetContext(ExpressionContext.IdentifierExpected);
 							}
 						}

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ExpressionContext.cs

@@ -226,10 +226,7 @@ namespace ICSharpCode.SharpDevelop.Dom
 			
 			public override string ToString()
 			{
-				if (allowImportClasses)
-					return "[" + GetType().Name + " AllowImportClasses=true]";
-				else
-					return "[" + GetType().Name + "]";
+				return "[" + GetType().Name + " AllowImportClasses=" + allowImportClasses.ToString() + "]";
 			}
 		}
 		#endregion