Enum rustc_const_eval::interpret::place::MemPlaceMeta

pub enum MemPlaceMeta<Tag: Provenance = AllocId> {
    Meta(Scalar<Tag>),
    None,
    Poison,
}

Information required for the sound usage of a MemPlace.

Variants

Meta(Scalar<Tag>)

The unsized payload (e.g. length for slices or vtable pointer for trait objects).

None

Sized types or unsized extern type

Poison

The address of this place may not be taken. This protects the MemPlace from coming from a ZST Operand without a backing allocation and being converted to an integer address. This should be impossible, because you can’t take the address of an operand, but this is a second protection layer ensuring that we don’t mess up.

Implementations

impl<Tag: Provenance> MemPlaceMeta<Tag>

pub fn unwrap_meta(self) -> Scalar<Tag>

fn has_meta(self) -> bool

Trait Implementations

impl<Tag: Clone + Provenance> Clone for MemPlaceMeta<Tag>

fn clone(&self) -> MemPlaceMeta<Tag>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Tag: Debug + Provenance> Debug for MemPlaceMeta<Tag>

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

Formats the value using the given formatter.

impl<Tag: Hash + Provenance> Hash for MemPlaceMeta<Tag>

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, 

Feeds a slice of this type into the given Hasher.

impl<'__ctx, Tag: Provenance> HashStable<StableHashingContext<'__ctx>> for MemPlaceMeta<Tag> where
    Tag: HashStable<StableHashingContext<'__ctx>>, 

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<Tag: PartialEq + Provenance> PartialEq<MemPlaceMeta<Tag>> for MemPlaceMeta<Tag>

fn eq(&self, other: &MemPlaceMeta<Tag>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &MemPlaceMeta<Tag>) -> bool

This method tests for !=.

impl<Tag: Copy + Provenance> Copy for MemPlaceMeta<Tag>

impl<Tag: Eq + Provenance> Eq for MemPlaceMeta<Tag>

impl<Tag: Provenance> StructuralEq for MemPlaceMeta<Tag>

impl<Tag: Provenance> StructuralPartialEq for MemPlaceMeta<Tag>

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.