Derive Macro bytemuck_derive::NoUninit
source · #[derive(NoUninit)]
{
// Attributes available to this derive:
#[bytemuck]
}
Expand description
Derive the NoUninit
trait for a struct or enum
The macro ensures that the type follows all the the safety requirements
for the NoUninit
trait.
The following constraints need to be satisfied for the macro to succeed
(the rest of the constraints are guaranteed by the NoUninit
subtrait
bounds, i.e. the type must be Sized + Copy + 'static
):
If applied to a struct:
- All fields in the struct must implement
NoUninit
- The struct must be
#[repr(C)]
or#[repr(transparent)]
- The struct must not contain any padding bytes
- The struct must contain no generic parameters
If applied to an enum:
- The enum must be explicit
#[repr(Int)]
,#[repr(C)]
, or both - All variants must be fieldless
- The enum must contain no generic parameters