[Bug c++/47108] enum won't use long long as underlying type

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47108

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-12-29 18:29:07 UTC ---
(In reply to comment #3)
> indeed it works then. i find the behaviour pretty obscure though, why is
> it that way?

Because 1 is of type int and doing a shift on it does not change its type and
it is undefined what happens when the shiftor is greater than the size of the
type.  So starting with 1LL and doing the shift will get you a value that is
correct.