Is it possible to use an UDA to generate a struct inside a class ?

[Basile Burg via Digitalmars-d-learn]

On Thursday, 1 January 2015 at 21:15:27 UTC, Ali Çehreli wrote:
> On 01/01/2015 09:35 AM, Basile Burg wrote:
>
> > On Tuesday, 30 December 2014 at 19:18:41 UTC, Basile Burg
> wrote:
>
> > an ICE (every
> > compiler crash is an ICE right ?),
>
> Yes, the compiler should never crash but produce an error 
> message. Please report it preferably with a reduced code sample:

The report is filed. I was not sure of its validity or if it 
could be a dup.

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> You realize, all of those foreach'es are processed at 
> compile-time for code generation. There will be no 'o' at run 
> time; so its address cannot be used.

Instead, Can I get the *relative offset* of a particular member 
at compile-time ?
Then at run-time I could easily define the delegate, eg:

// the AA or some arrays filled at compile-time
ptrdiff_t[string] gettersOffset;
ptrdiff_t[string] settersOffset;

// a delegate, set at run-time, for example in this().
myDelegate.funcptr = gettersOffset["propIdentifier"];
myDelegate.ptr = cast(void*) this;

If so then the problem is solved...even if other problems could 
appends, for example if the methods are final, if they are 
inlined...

Actually I'd be surprised that nobody has already designed 
something similar for properties (kind of "published" attribute 
as defined in Pascal-like languages.)