#[non_exhaustive]
pub enum MonitoringJobDefinitionSortKey {
CreationTime,
Name,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MonitoringJobDefinitionSortKey
, 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 monitoringjobdefinitionsortkey = unimplemented!();
match monitoringjobdefinitionsortkey {
MonitoringJobDefinitionSortKey::CreationTime => { /* ... */ },
MonitoringJobDefinitionSortKey::Name => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when monitoringjobdefinitionsortkey
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MonitoringJobDefinitionSortKey::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MonitoringJobDefinitionSortKey::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 MonitoringJobDefinitionSortKey::NewFeature
is defined.
Specifically, when monitoringjobdefinitionsortkey
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MonitoringJobDefinitionSortKey::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
CreationTime
Name
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for MonitoringJobDefinitionSortKey
impl AsRef<str> for MonitoringJobDefinitionSortKey
source§impl Clone for MonitoringJobDefinitionSortKey
impl Clone for MonitoringJobDefinitionSortKey
source§fn clone(&self) -> MonitoringJobDefinitionSortKey
fn clone(&self) -> MonitoringJobDefinitionSortKey
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 MonitoringJobDefinitionSortKey
impl From<&str> for MonitoringJobDefinitionSortKey
source§impl Ord for MonitoringJobDefinitionSortKey
impl Ord for MonitoringJobDefinitionSortKey
source§fn cmp(&self, other: &MonitoringJobDefinitionSortKey) -> Ordering
fn cmp(&self, other: &MonitoringJobDefinitionSortKey) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<MonitoringJobDefinitionSortKey> for MonitoringJobDefinitionSortKey
impl PartialEq<MonitoringJobDefinitionSortKey> for MonitoringJobDefinitionSortKey
source§fn eq(&self, other: &MonitoringJobDefinitionSortKey) -> bool
fn eq(&self, other: &MonitoringJobDefinitionSortKey) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<MonitoringJobDefinitionSortKey> for MonitoringJobDefinitionSortKey
impl PartialOrd<MonitoringJobDefinitionSortKey> for MonitoringJobDefinitionSortKey
source§fn partial_cmp(&self, other: &MonitoringJobDefinitionSortKey) -> Option<Ordering>
fn partial_cmp(&self, other: &MonitoringJobDefinitionSortKey) -> 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 MonitoringJobDefinitionSortKey
impl StructuralEq for MonitoringJobDefinitionSortKey
impl StructuralPartialEq for MonitoringJobDefinitionSortKey
Auto Trait Implementations§
impl RefUnwindSafe for MonitoringJobDefinitionSortKey
impl Send for MonitoringJobDefinitionSortKey
impl Sync for MonitoringJobDefinitionSortKey
impl Unpin for MonitoringJobDefinitionSortKey
impl UnwindSafe for MonitoringJobDefinitionSortKey
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.