Struct Slot

pub struct Slot<'s> { /* private fields */ }

Allows writing into a struct field or inserting into a hash map.

Implementations

impl<'s> Slot<'s>

pub fn for_ptr( ptr: NonNull<u8>, shape: ShapeDesc, init_mark: InitMark<'s>, ) -> Self

Create a new slot for writing into a struct field — not just foo.bar, but also foo.2 for tuples, foo.0 for newtype wrappers, etc.

pub fn for_hash_map(map: NonNull<u8>, key: String, shape: ShapeDesc) -> Self

Create a new slot for writing into a HashMap. This is a different kind of slot because the field has to be allocated on the heap first and then inserted into the hashmap.

pub fn fill<T: Shapely>(self, value: T)

Fills the slot with a value of a concrete type. This performs a type check and panics if the type is incompatible with the slot’s shape.

If the slot is already initialized, the old value is dropped.

pub fn fill_from_partial(self, partial: Partial<'_>)

pub fn shape(&self) -> ShapeDesc