[nem-en] Re: += Macro and delegates

[Andrey Khropov]

Kamil Skalski wrote:

> I thought you are transforming TExpr into CodeDom tree? Why do you
> need to generate TExprs from those expressions?

Yes. But in TExpr.MacroEnvelope original is PExpr. I can't use expanded because 
Form designer doesn't understand what it does: 
----------------------------------------------------------------
mutable _N_cached_obj4611 = this.button1;
_N_cached_obj4611.add_Click(System.EventHandler(this.button1_Click));
----------------------------------------------------------------

It needs CodeDom.CodeAttachEventStatement. That's why I need to somehow create
typed e and method from their PExpr representations:
-------------------------------------
match (original) {
 | <[ $e += $method ]> =>
	CreateCodeAttachEventStatement(e,method)
}
...

CreateCodeAttachEventStatement(e:PExpr, method:PExpr) : CodeAttachEventStatement
{
	?
}
-------------------------------------