Create class on stack

[Johnson Jones via Digitalmars-d-learn]

using gtk, it has a type called value. One has to use it to get 
the value of stuff but it is a class. Once it is used, one 
doesn't need it.

Ideally I'd like to treat it as a struct since I'm using it in a 
delegate I would like to minimize unnecessary allocations. Is 
there any way to get D to allocate a class on the stack like a 
local struct?