Variant/Variant/Box wrappers?

[Christopher Wright]

Hey --

I've got stuff that I want to work in dmd1/phobos, dmd2/phobos, and 
dmd1/tango. I really want to use boxing, since it'd make a lot of stuff 
easier, but there are three disparate structs to support: tango Variant, 
phobos Variant, and phobos Box.

Does anyone have wrappers for these? If so, do they handle structs of 
arbitrary sizes? (Phobos Variant doesn't, which makes it mostly useless 
without a wrapper anyway.)