jimmy hacking (at) microsoft wpi | flaud | 2008-11-24 open source programming languages

I'm back!

Jimmy Schementi http://blog.jimmy.schementi.com

2002-2007

Jimmy, show Logo Demo!

.testing

Terminology Java Language  C# Java Platform  .NET Platform (CLR) Flash + Java applets + JavaFX  Silverlight

IronPython 1.0

September 2006

Python 2.4 Compatible

CLR great for dynamic languages But requires a lot of work

DLR Dynamic Language Runtime

Compiler Infrastructure

compiler front-end return Syntax Tree Return def add2(a) { return 2 + a; } Scan 2 + a ; Parse Token stream Add Named(a) Const(2)

compiler back-end on CLR 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 LangHelpers::Add(object, object) ret IL public static object Add (object x, object y) { ... } Runtime Library

compiler back-end on DLR Syntax Tree Return Add Named(a) Const(2) Generate DLR Tree DLR Tree Return MethodCall LangHelpers.Add BoundExpression ConstantExpression 2 ConvertTo Object Variable a: Object

two ways to call def yo (name): "hello " + name print yo("jimmy") MethodCallExpression Method : {RuntimeMethodInfo {Name: "Print"}} Arguments : [0] ActionExpression ActionExpression yo("jimmy") Action : CallAction Arguments : [0] {BoundExpression {Variable: Local{yo}}} [1] {ConstantExpression {"jimmy"}}

def yo (name):

"hello " + name

print yo("jimmy")

public static object Handle ( object[] args, DynamicSite<object, object, object> site1, object obj1, object obj2) { if (obj1 != null && obj1.GetType() == typeof(string) && obj2 != null && obj2.GetType() == typeof(string)) { return StringOps.Add(Converter.ConvertToString(obj1), Converter.ConvertToString(obj2)); } return site1.UpdateBindingAndInvoke(obj1, obj2); }

public static object Handle (

object[] args, DynamicSite<object, object, object> site1,

object obj1, object obj2)

{

if (obj1 != null && obj1.GetType() == typeof(string) &&

obj2 != null && obj2.GetType() == typeof(string))

{

return StringOps.Add(Converter.ConvertToString(obj1),

Converter.ConvertToString(obj2));

}

return site1.UpdateBindingAndInvoke(obj1, obj2);

}

public static object Handle ( object[] args, DynamicSite<object, object, object> site1, object obj1, object obj2) { if (obj1 != null && obj1.GetType() == typeof(int) && obj2 != null && obj2.GetType() == typeof(int)) { return Int32Ops.Add(Converter.ConvertToInt(obj1), Converter.ConvertToInt(obj2)); } if (obj1 != null && obj1.GetType() == typeof(string) && obj2 != null && obj2.GetType() == typeof(string)) { return StringOps.Add(Converter.ConvertToString(obj1), Converter.ConvertToString(obj2)); } return site1.UpdateBindingAndInvoke(obj1, obj2); }

public static object Handle (

object[] args, DynamicSite<object, object, object> site1,

object obj1, object obj2)

{

if (obj1 != null && obj1.GetType() == typeof(int) &&

obj2 != null && obj2.GetType() == typeof(int))

{

return Int32Ops.Add(Converter.ConvertToInt(obj1),

Converter.ConvertToInt(obj2));

}

if (obj1 != null && obj1.GetType() == typeof(string) &&

obj2 != null && obj2.GetType() == typeof(string))

{

return StringOps.Add(Converter.ConvertToString(obj1),

Converter.ConvertToString(obj2));

}

return site1.UpdateBindingAndInvoke(obj1, obj2);

}

Hosting &quot;eval&quot; of any language, in any language

Auto Completion Static Language: Easy

Auto Completion Dynamic Language: Holy Crap class Foo def bar end end Foo .class_eval do def baz end end f = Foo.new class << f def bang end end f. WTF?

REPL

Lisp Read Eval Print

r ead e val p rint l oop

Jimmy, show Ruby Demo!

Jimmy, show DLRConsole Demo!

Jimmy, show console=true Demo!

Jimmy, show embedding Demo!

rails + silverlight demo

http://www.flickr.com/photos/marchange/444184871/

http://silverlight.net http://codeplex.com/sdlsdk http://github.com/jschementi/agdlr http://codeplex.com/ironpython http://ironruby.net http://codeplex.com/dlr

http://silverlight.net

http://codeplex.com/sdlsdk

http://github.com/jschementi/agdlr

http://codeplex.com/ironpython

http://ironruby.net

http://codeplex.com/dlr

Recap Silverlight lets you do crazy things with Ruby/Python REPLs are awesome Ruby is crazy DLR: Write a language without the compiler Open source rocks

http://peaceplusone.com/img/hippie.jpg