[nem-en] Multiple project solutions

[vc]

> For exampe I use logging
> macros, which generate the log4j logger as field in current class on
> need - if my
> 
> log (DEBUG, "...")

What for?

> Also, we have seen interesing examples of macros generating whole classes:
> 
>     metaclass myMeta { x : int; y : string };
>     assert (myMeta (1, "").X == 1);
>     assert (myMeta (2, "a").Y == "a");

It's can be (and must be) placed in meta-attribute:
[assembly: Metaclass(myMeta { x : int; y : string })]

Understand, we *cannot guarantee* that method bodies compiled in
design-time.

If we admit generation of top level constructions in expression macros it
will result in undefined behavior (in design-time). And behavior in
design-time and compile-time will be differing.