pub type NonZeroU8 = NonZero<u8>;
Expand description
A u8
that is known not to equal zero.
This enables some memory layout optimization.
For example, Option<NonZeroU8>
is the same size as u8
:
§Layout
NonZeroU8
is guaranteed to have the same layout and bit validity as u8
with the exception that 0
is not a valid instance.
Option<NonZeroU8>
is guaranteed to be compatible with u8
,
including in FFI.
Thanks to the null pointer optimization,
NonZeroU8
and Option<NonZeroU8>
are guaranteed to have the same size and alignment:
Aliased Type§
struct NonZeroU8(/* private fields */);