It could be. If it is not, it may be that Option needs some love at the CodeGen level to make it so :)
-- Matthieu. On Wed, Jul 24, 2013 at 6:46 PM, Corey Richardson <co...@octayn.net> wrote: > On Wed, Jul 24, 2013 at 12:42 PM, Matthieu Monrocq > <matthieu.monr...@gmail.com> wrote: > > Given that all values of u8 are meanginful, there is no space for an > extra > > bit, so it is no surprise that it cannot be packed. > > > > For pointers, for example, it is typical to exploit the fact that the > null > > pointer is a meaningless value and thus rely on this sentinel value to > > encode the absence of value, but in general this is only possible if > such a > > sentinel value is possible to begin with. > > > > I would expect it to be backed into a u16. >
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