Benjamin Thaut:
I would prefer a option where the user can specifiy a function to scan classes / structs that contain unions percisely instead of pinning it. In generall I would want a option to specify a manual scanning function for any block of GC managed memory, D is a systems programming language after all and specifing a custom scanning functionn can be a lot more effective then assuming the worst possible case for that memory block.
Time ago I suggested an optional standard method for unions of structs named as "onGC", that if present is used by the GC at run-time to know what to do with the contents of the unions.
Bye, bearophile
