Struct Tag 

pub struct Tag<K: ?Sized>(/* private fields */);

Pure phantom service identity (K is usually a ZST marker type).

Implementations

impl<K: ?Sized> Tag<K>

pub const fn new() -> Self

Canonical Tag value for the key type K.

Trait Implementations

impl<K: Clone + ?Sized> Clone for Tag<K>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: ?Sized> Debug for Tag<K>

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

Formats the value using the given formatter.

impl<K: ?Sized> Default for Tag<K>

fn default() -> Self

Returns the “default value” for a type.

impl<K: ?Sized> Hash for Tag<K>

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<K: ?Sized> PartialEq for Tag<K>

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K: Copy + ?Sized> Copy for Tag<K>

impl<K: ?Sized> Eq for Tag<K>