Enum Observation 

pub enum Observation<T> {
    Known {
        value: T,
        evidence: String,
    },
    Absent {
        reason: String,
    },
    Unknown {
        reason: String,
    },
    Unsupported {
        capability: String,
        reason: String,
    },
}

Evidence-qualified fact. Unknown and unsupported are never coerced to false.

Variants

Known

The producer knows the value and names the evidence behind it.

Fields

value: T

Observed value.

evidence: String

Provenance of the observation.

Absent

The fact has no value for the named lifecycle/layout reason.

Fields

reason: String

Why no value exists.

Unknown

The fact may become observable on a later revision.

Fields

reason: String

Why evidence is not currently available.

Unsupported

The negotiated producer cannot provide this capability.

Fields

capability: String

Missing wire or framework capability.

reason: String

Why the capability is unavailable.

Trait Implementations

impl<T: Clone> Clone for Observation<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Observation<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for Observation<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: Eq> Eq for Observation<T>

impl<T: PartialEq> PartialEq for Observation<T>

fn eq(&self, other: &Observation<T>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<T> Serialize for Observation<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: PartialEq> StructuralPartialEq for Observation<T>