Hi Szymon, Sorry for delayed response.
The exact difference between the two modes is that FastEval does not generate IL to be executed. Instead, it walks the abstract syntax tree and evaluates the expressions directly. The reason you are seeing the error is that the name resolution for the expression evaluator doesn't consider built-in names (str, int, None, ...). There may be bugs beyond this simple one, but after getting the name resolution to consider built-in names, referencing "str", "None" and the like does work. I am going to include the fix in the 0.9.3 release. Martin -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Szymon Kobalczyk Sent: Tuesday, October 04, 2005 12:26 PM To: users-ironpython.com@lists.ironpython.com Subject: [IronPython] Error when using Options.FastEval Hi, Few days ago I wrote about a problem with Options.FastEval. I noticed today that accidentally it was posted as replay to some other topic and I'm not sure that anyone has seen it. So here it is again: --- Last time I wrote here I was concerned with memory consumption and performance of embedding IronPython. I decided then to use the FastEval option. I think I found some error in this mode. In code below the last line would throw "Key not found in dictionary." exception caused by the "None" term. When you don't use the FastEval the code runs properly. static void Main(string[] args) { IronPython.AST.Options.FastEval = true; IronPython.AST.Options.DoNotSaveBinaries = true; PythonEngine engine = new PythonEngine(); engine.SetVariable("item", null); object value = engine.Evaluate("item == None"); } Also, could you please explain what exactly are the differences between the two modes. Szymon Kobalczyk. PS: Just found that it also doesn't work for the "str" builtin function but didn't have time to try others. _______________________________________________ users-ironpython.com mailing list users-ironpython.com@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com _______________________________________________ users-ironpython.com mailing list users-ironpython.com@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
