This document discusses IronPython and the Dynamic Language Runtime (DLR) framework. It provides an overview of the DLR and how it allows dynamic languages like IronPython to run on the .NET Common Language Runtime. Key points include how the DLR uses expression trees to represent code and handle dynamic operations, how languages can generate and target DLR expression trees, and how .NET types can be customized through extension methods. Visual Studio integration and example uses of IronPython are also briefly mentioned.

1. IronPython and Dynamic Languages on .NET Mahesh Prakriya [email_address] Principal PM Lead, DLR

3. DLR Dynamic Languages VBx JScript IronPython IronRuby 3rd Party langs CLR Frameworks VS Integration Tools WinForms, WPF Applications ASP.net, Silverlight Robotics, XNA

5. IronPython Demos: Compatability Winforms/Tablet Silverlight WebServices Mahesh Prakriya [email_address]

6. Standard Pystone Benchmark IronPython 0.1 Python 2.3 IronPython 1.0 IronPython 2.0 alpha1 Python 2.5 Python 2.1

7. Rough Roadmap

10. Copyright Microsoft Corporation

11. Copyright Microsoft Corporation

12. Copyright Microsoft Corporation

14. Microsoft Robotics Studio

16. DLR Dynamic Languages VBx JScript IronPython IronRuby 3rd Party langs CLR Frameworks VS Integration Tools WinForms, WPF Applications ASP.net, Silverlight Robotics, XNA

17. Resources: www.codeplex.com/ironpython Mahesh Prakriya [email_address] IronPython Samples, Videos etc. blogs.msdn.com/ironpython Silverlight silverlight.net and codeplex.com/dynamicsilverlight ASP.NET asp.net/downloads/futures Web Services blogs.msdn.com/dmitryr

18. Questions? Image By Little Bitty Tam http://www.flickr.com/photos/tammra/

20. Compiler Overview Frontend return Syntax Tree Return def add2(a) { return 2 + a; } Scan 2 + a ; Parse Token stream Add Named(a) Const(2)

21. Compiler Overview Traditional Backend Syntax Tree Return Add Named(a) Const(2) Generate IL ldc.i4.2 // load 2 box [mscorlib]System.Int32 ldarg.0 // load “a” call object ToyHelpers::Add(object, object) ret IL public static object Add (object x, object y) { ... } Runtime Library

22. Compiler Overview DLR Backend Syntax Tree Return Add Named(a) Const(2) Generate DLR Tree public static object Add (object x, object y) { ... } Runtime Library DLR Tree Return MethodCall ToyHelpers.Add BoundExpression ConstantExpression 2 ConvertTo Object Variable a: Object

28. Demo DLR Trees Image By Ryan Forsythe: http://flickr.com/photos/fweez/

31. Operators Action Expression BoundExpression Variable a Action Add BoundExpression Variable b

40. Demo Actions Image by Kim S http://flickr.com/photos/dearbarbie