#[non_exhaustive]
pub enum MonitoringAlertStatus {
InAlert,
Ok,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MonitoringAlertStatus
, 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 monitoringalertstatus = unimplemented!();
match monitoringalertstatus {
MonitoringAlertStatus::InAlert => { /* ... */ },
MonitoringAlertStatus::Ok => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when monitoringalertstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MonitoringAlertStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MonitoringAlertStatus::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 MonitoringAlertStatus::NewFeature
is defined.
Specifically, when monitoringalertstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MonitoringAlertStatus::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is 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
InAlert
Ok
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for MonitoringAlertStatus
impl AsRef<str> for MonitoringAlertStatus
source§impl Clone for MonitoringAlertStatus
impl Clone for MonitoringAlertStatus
source§fn clone(&self) -> MonitoringAlertStatus
fn clone(&self) -> MonitoringAlertStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for MonitoringAlertStatus
impl Debug for MonitoringAlertStatus
source§impl From<&str> for MonitoringAlertStatus
impl From<&str> for MonitoringAlertStatus
source§impl FromStr for MonitoringAlertStatus
impl FromStr for MonitoringAlertStatus
source§impl Hash for MonitoringAlertStatus
impl Hash for MonitoringAlertStatus
source§impl Ord for MonitoringAlertStatus
impl Ord for MonitoringAlertStatus
source§fn cmp(&self, other: &MonitoringAlertStatus) -> Ordering
fn cmp(&self, other: &MonitoringAlertStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<MonitoringAlertStatus> for MonitoringAlertStatus
impl PartialEq<MonitoringAlertStatus> for MonitoringAlertStatus
source§fn eq(&self, other: &MonitoringAlertStatus) -> bool
fn eq(&self, other: &MonitoringAlertStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<MonitoringAlertStatus> for MonitoringAlertStatus
impl PartialOrd<MonitoringAlertStatus> for MonitoringAlertStatus
source§fn partial_cmp(&self, other: &MonitoringAlertStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &MonitoringAlertStatus) -> 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 MonitoringAlertStatus
impl StructuralEq for MonitoringAlertStatus
impl StructuralPartialEq for MonitoringAlertStatus
Auto Trait Implementations§
impl RefUnwindSafe for MonitoringAlertStatus
impl Send for MonitoringAlertStatus
impl Sync for MonitoringAlertStatus
impl Unpin for MonitoringAlertStatus
impl UnwindSafe for MonitoringAlertStatus
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.