#[non_exhaustive]pub enum SessionsStatisticsAggregationStatus {
Completed,
Failed,
InProgress,
Timeout,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against SessionsStatisticsAggregationStatus, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let sessionsstatisticsaggregationstatus = unimplemented!();
match sessionsstatisticsaggregationstatus {
SessionsStatisticsAggregationStatus::Completed => { /* ... */ },
SessionsStatisticsAggregationStatus::Failed => { /* ... */ },
SessionsStatisticsAggregationStatus::InProgress => { /* ... */ },
SessionsStatisticsAggregationStatus::Timeout => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when sessionsstatisticsaggregationstatus represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant SessionsStatisticsAggregationStatus::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
SessionsStatisticsAggregationStatus::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str on it yields "NewFeature".
This match expression is forward-compatible when executed with a newer
version of SDK where the variant SessionsStatisticsAggregationStatus::NewFeature is defined.
Specifically, when sessionsstatisticsaggregationstatus represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on SessionsStatisticsAggregationStatus::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Completed
Failed
InProgress
Timeout
Unknown(UnknownVariantValue)
Unknown. See the docs on this enum for the correct way to handle unknown variants.Unknown contains new variants that have been added since this code was generated.
Implementations§
source§impl SessionsStatisticsAggregationStatus
impl SessionsStatisticsAggregationStatus
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl Clone for SessionsStatisticsAggregationStatus
impl Clone for SessionsStatisticsAggregationStatus
source§fn clone(&self) -> SessionsStatisticsAggregationStatus
fn clone(&self) -> SessionsStatisticsAggregationStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl From<&str> for SessionsStatisticsAggregationStatus
impl From<&str> for SessionsStatisticsAggregationStatus
source§impl Ord for SessionsStatisticsAggregationStatus
impl Ord for SessionsStatisticsAggregationStatus
source§fn cmp(&self, other: &SessionsStatisticsAggregationStatus) -> Ordering
fn cmp(&self, other: &SessionsStatisticsAggregationStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for SessionsStatisticsAggregationStatus
impl PartialEq for SessionsStatisticsAggregationStatus
source§fn eq(&self, other: &SessionsStatisticsAggregationStatus) -> bool
fn eq(&self, other: &SessionsStatisticsAggregationStatus) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for SessionsStatisticsAggregationStatus
impl PartialOrd for SessionsStatisticsAggregationStatus
source§fn partial_cmp(
&self,
other: &SessionsStatisticsAggregationStatus
) -> Option<Ordering>
fn partial_cmp( &self, other: &SessionsStatisticsAggregationStatus ) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self and other) and is used by the <=
operator. Read moreimpl Eq for SessionsStatisticsAggregationStatus
impl StructuralPartialEq for SessionsStatisticsAggregationStatus
Auto Trait Implementations§
impl Freeze for SessionsStatisticsAggregationStatus
impl RefUnwindSafe for SessionsStatisticsAggregationStatus
impl Send for SessionsStatisticsAggregationStatus
impl Sync for SessionsStatisticsAggregationStatus
impl Unpin for SessionsStatisticsAggregationStatus
impl UnwindSafe for SessionsStatisticsAggregationStatus
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.