Struct DynamicKey 

pub struct DynamicKey { /* private fields */ }

A Praxis value used as a hash-collection key, paired with its descriptor so Rust’s HashMap/HashSet can hash and compare it structurally (§11.3).

Two keys are equal iff they carry the same descriptor and that descriptor’s equals callback reports them structurally equal (§5.5). The GcRef is the rooted value; the descriptor is the &'static TypeDescriptor the value’s own header names.

Both fields are private and the descriptor is derived from the value, so “a key whose descriptor names a different type than its payload” is unrepresentable: DynamicKey::new is the only way in, and it reads the descriptor out of the object’s header.

Implementations

impl DynamicKey

pub fn new(value: GcRef) -> Self

Wrap a GcRef as a key, pairing it with its descriptor.

pub fn value(&self) -> GcRef

The wrapped value.

pub fn descriptor(&self) -> &'static TypeDescriptor

The descriptor selecting this key’s hash/equals callbacks. Always the value’s own descriptor.

Trait Implementations

impl Clone for DynamicKey

fn clone(&self) -> DynamicKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DynamicKey

impl Debug for DynamicKey

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

Formats the value using the given formatter.

impl Eq for DynamicKey

impl Hash for DynamicKey

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 PartialEq for DynamicKey

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.