Dynamic D

[Robert Jacques]

On Mon, 03 Jan 2011 17:23:29 -0500, Adam Ruppe <destructionator at gmail.com>  
wrote:
> Over the weekend, I attacked opDispatch again and found some old
> Variant bugs were killed. I talked about that in the Who uses D
> thread.
>
> Today, I couldn't resist revisiting a dynamic kind of object, and
> made some decent progress on it.
>
> http://arsdnet.net/dcode/dynamic.d
>
> (You can compile that; there's a main() at the bottom of that file)
>
> It isn't quite done - still needs op overloading, and probably better
> errors, but it basically works.
>
> It works sort of like a Javascript object.
>
[snip]

I've been working on an update to both std.json and std.variant. Previews  
of both are available here:  
https://jshare.johnshopkins.edu/rjacque2/public_html/
though they are still works in progress. Two of the big enhancements that  
you might be interested in are call support and opDispatch + reflection +  
prototype structs. To paraphrase your example:

     Variant v;
     v.a( 10 );
     assert(v.a == 10);
     v.a( { writefln("hello, world"); } );
     v.a.call;  //To be replaced by opCall, once struct opCall is fixed  
(Bug 4053)
     v.a( delegate void(string a, int x) { foreach(i;0..x) writeln(i+1,"  
",a); } );
     v.a("potatoes", 3);

I've also stubbed out a prototype style object, but I haven't really  
tested it yet. Thoughts, comments and use/test cases are always welcomed.