[Bug c/59850] Support sparse-style pointer address spaces (type attributes)

[tromey at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59850

--- Comment #18 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to Tom Tromey from comment #17)
> It seems that "force" works on function parameters and casts
> but not direct assignments:

It's also an error in conditional expressions and in a "return".

I can implement this exactly but I'm curious whether it is intended.