How to list aggregate members in order of declaration at compile time?

[Ivan Kazmenko via Digitalmars-d-learn]

On Thursday, 10 November 2016 at 10:16:44 UTC, Ivan Kazmenko 
wrote:
> I want to somehow list members of a class in the order of their 
> declaration.

Bump.  Anyone?  I've met my immediate goal by other means, but 
the general question remains.

If classes are no-go, basically, any aggregate will do if the 
order of declarations is reliably and reproducibly known at 
compile time.

I'm not much into compile-time reflection, yet, but I thought 
that's a basic operation.  Otherwise, how do people, for example, 
approach serializing arbitrary containers reproducibly across 
compiler versions - or they just don't?  Well, I've seen one 
example (Cerealed), but the implementation details there seem to 
contradict the current language documentation.

Ivan Kazmenko.