How Silverlight supports dynamic languages

I am not at this conference, but anyway...

What I was wondering is how Silverlight does support these super-cool dynamic languages 'on-the-fly'. After some fiddling, this is what I think how it works:

• 'Non-real' CLR languages like IronPython or IronRuby have a parser which converts the source code to a language-specific abstract syntax tree (AST).
• The language specific AST is transformed to a language-independent dynamic language runtime (DLR) AST.
• DLR's code generation converts the DLR AST to IL code using Reflection.Emit (and Light-Weight Code Generation [LCG]). A delegate is created pointing to the new DynamicMethod.
• The delegate is finally invoked.

Can anybody confirm this?

Comments

[Christian Weyer]

[This is a comment from John Lam] That's right. You could theoretically go straight to the DLR AST but experience shows that it's too hard to understand without going through a language specific AST first. IronRuby, JScript, and VB are all implemented this way as well.