Enum UnsizingMetadata 

pub enum UnsizingMetadata<'tcx> {
    Length(ConstantExpr<'tcx>),
    DirectVTable(TraitProof<'tcx>),
    NestedVTable(DynBinder<'tcx, TraitProof<'tcx>>),
    Unknown,
}

The metadata to attach to the newly-unsized ptr.

Variants

Length(ConstantExpr<'tcx>)

Unsize an array to a slice, storing the length as metadata.

DirectVTable(TraitProof<'tcx>)

Unsize a non-dyn type to a dyn type, adding a vtable pointer as metadata.

NestedVTable(DynBinder<'tcx, TraitProof<'tcx>>)

Unsize a dyn-type to another dyn-type, (optionally) indexing within the current vtable.

Unknown

Couldn’t compute

Trait Implementations

impl<'tcx> Clone for UnsizingMetadata<'tcx>

fn clone(&self) -> UnsizingMetadata<'tcx>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for UnsizingMetadata<'tcx>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'tcx> Eq for UnsizingMetadata<'tcx>

impl<'tcx> Hash for UnsizingMetadata<'tcx>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'tcx> PartialEq for UnsizingMetadata<'tcx>

fn eq(&self, other: &UnsizingMetadata<'tcx>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<'tcx> StructuralPartialEq for UnsizingMetadata<'tcx>