Code editor throws exceptions in some cases related to intellisense

[abeham]

When adding a new programmable operator and viewing the code, howevering over the as keyword throws following exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at ICSharpCode.SharpDevelop.Dom.CtrlSpaceResolveHelper.GetResultFromDeclarationLine(IClass callingClass, IMethodOrProperty callingMember, Int32 caretLine, Int32 caretColumn, ExpressionResult expressionResult)
   at ICSharpCode.SharpDevelop.Dom.NRefactoryResolver.NRefactoryResolver.Resolve(ExpressionResult expressionResult, ParseInformation parseInfo, String fileContent)
   at HeuristicLab.CodeEditor.ToolTipProvider.OnToolTipRequest(Object sender, ToolTipRequestEventArgs e)
   at ICSharpCode.TextEditor.ToolTipRequestEventHandler.Invoke(Object sender, ToolTipRequestEventArgs e)
   at ICSharpCode.TextEditor.TextArea.RequestToolTip(Point mousePos)
   at ICSharpCode.TextEditor.TextArea.OnMouseHover(EventArgs e)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[epitzer]

r7746 check for null expression before resolving symbol for tool tip information

[abeham]

Thanks for fixing this. I received another exception when intellisense wants to pop up after typing a "." on an enumerable of an anonymous type. To reproduce paste the following code into a programmable operator.

var myEnum = Enumerable.Range(0, 100).Select(x => new { Linear = x, Squared = x*x }).ToArray();

Then try to write e.g. "myEnum.Count();". A NullReferenceException will be thrown once you type the "." at which point the view will become out of sync. You can type further text, but it will show up only when you close and reopen the view. Maybe you can generally prevent the view from going out of sync with the text in case exceptions occur.

[abeham]

Btw, I noticed intellisense doesn't work well with anonymous types in general. It doesn't list the properties in the intellisense popup window. Don't know if that would be a lot of effort to fix or is that a sharpdevelop limitation?

[epitzer]

r7983 catch exceptions from sharp develop code completion

[abeham]

I tested it. Thanks for fixing this!