pub type NonZeroI32 = NonZero<i32>;Expand description
An i32 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 */);