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).

Tuple Fields of Meta

0: Scalar<Tag>

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.