How to use D for cross platform development?

[Chris W.]

On Thursday, 29 March 2012 at 12:10:17 UTC, Jacob Carlborg wrote:
> I have some with using Objective-C together with D. It's a lot 
> more verbose and quite more complicated than using a C library 
> with D.
>
> How complicated it is depends on what one want to do with the 
> Objective-C library. Obviously one want to create Objective-C 
> objects and call Objective-C methods. But if it's necessary to 
> create subclasses in D and have Objective-C create instances of 
> those classes and call methods on the objects it gets even more 
> complicated.
>
> I would recommend to have a look at Michel Fortin's fork of DMD 
> which adds support for binding to Objective-C code directly, 
> i.e. extern(Objective-C). Note that it's not 100% complete and 
> based on an older version of DMD.
>
> http://michelf.com/projects/d-objc/

Thanks for the link. Objective-C is basically C and can be 
implemented in C style as far as I know. Is it worth going down 
to the C level like so:

struct NSObject {
struct objc_class* isa;
}
struct objc_class {
     Class isa;
     Class super_class;
     const char *name;
     long version;
     long info;
     long instance_size;
     struct objc_ivar_list *ivars;
     struct objc_method_list **methodLists;
     struct objc_cache *cache;
     struct objc_protocol_list *protocols;
}

Just a random thought.