Enum View 

pub enum View<'sample, T>
where
    T: Topicable,
{
    Sample(&'sample T),
    Key(&'sample T::Key),
}

A borrowed view into a SampleOrKey for pattern matching.

Obtained via SampleOrKey::view. Distinguishes between a full sample and a key-only sample without consuming the SampleOrKey and without implicitly materializing the other half.

Examples

use cyclonedds::sample::View;

for sample in reader.read()? {
    match sample.view() {
        View::Sample(sample) => println!("got sample: {sample:?}"),
        View::Key(key) => println!("got key-only: {key:?}"),
    }
}

Variants

Sample(&'sample T)

A full data sample.

Key(&'sample T::Key)

A key-only notification, produced when an instance is disposed or unregistered.

Trait Implementations

impl<T> Debug for View<'_, T>

where T: Topicable, T::Key: Debug,

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

Formats the value using the given formatter.

impl<T> PartialEq for View<'_, T>

where T: Topicable + PartialEq, T::Key: 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.