Type Alias std::num::NonZeroI32
1.34.0 · source · pub type NonZeroI32 = NonZero<i32>;
Expand description
An integer that is known not to equal zero.
This enables some memory layout optimization.
For example, Option<NonZeroI32>
is the same size as i32
:
§Layout
NonZeroI32
is guaranteed to have the same layout and bit validity as i32
with the exception that 0
is not a valid instance.
Option<NonZeroI32>
is guaranteed to be compatible with i32
,
including in FFI.
Thanks to the null pointer optimization,
NonZeroI32
and Option<NonZeroI32>
are guaranteed to have the same size and alignment:
Aliased Type§
struct NonZeroI32(/* private fields */);