Enum Tracked

pub enum Tracked<T> {
    None,
    Unknown,
    Known(T),
}

Tracks the known state of a value.

Variants

None

Value does not exist.

Unknown

Value exists, but its content is not known.

Known(T)

Value exists.

Trait Implementations

impl<T: Clone> Clone for Tracked<T>

fn clone(&self) -> Tracked<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Tracked<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for Tracked<T>

where T: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Hash for Tracked<T>

where T: Hash,

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<T> MaybeEq for Tracked<T>

where T: MaybeEq,

fn maybe_eq(&self, other: &Self) -> Equality

impl<T> PartialEq for Tracked<T>

where T: PartialEq,

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<T> Serialize for Tracked<T>

where T: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq> Eq for Tracked<T>