Enum ChangeSource 

pub enum ChangeSource {
    Event,
    LocalAction,
    Fetch,
}

Where a property value came from.

Recorded on every write and carried on every ChangeEvent, for two reasons: it breaks ties between writes that share an Instant (the variant order below is the tie-break order, most authoritative first), and it lets a consumer tell a device-pushed value apart from one this process just wrote optimistically.

Variants

Event

Decoded from a UPnP NOTIFY, or from a poll standing in for one.

The most authoritative source: the device volunteered this value, so it was true at the moment it was sent.

LocalAction

Written locally immediately after a control action succeeded.

The device acknowledged the action, so the value is true as of the acknowledgement — but it is our inference, not the device’s report.

Fetch

Returned by an explicit fetch() SOAP read.

The least authoritative, because a fetch() observes the device at request time but lands at response time — see WriteStamp.

Trait Implementations

impl Clone for ChangeSource

fn clone(&self) -> ChangeSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ChangeSource

impl Debug for ChangeSource

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

Formats the value using the given formatter.

impl Eq for ChangeSource

impl PartialEq for ChangeSource

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ChangeSource