#[non_exhaustive]pub enum OptimizationJobStatus {
Completed,
Failed,
Inprogress,
Starting,
Stopped,
Stopping,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against OptimizationJobStatus, 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 optimizationjobstatus = unimplemented!();
match optimizationjobstatus {
OptimizationJobStatus::Completed => { /* ... */ },
OptimizationJobStatus::Failed => { /* ... */ },
OptimizationJobStatus::Inprogress => { /* ... */ },
OptimizationJobStatus::Starting => { /* ... */ },
OptimizationJobStatus::Stopped => { /* ... */ },
OptimizationJobStatus::Stopping => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when optimizationjobstatus represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant OptimizationJobStatus::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
OptimizationJobStatus::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 OptimizationJobStatus::NewFeature is defined.
Specifically, when optimizationjobstatus represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on OptimizationJobStatus::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
Starting
Stopped
Stopping
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 OptimizationJobStatus
impl OptimizationJobStatus
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 AsRef<str> for OptimizationJobStatus
impl AsRef<str> for OptimizationJobStatus
source§impl Clone for OptimizationJobStatus
impl Clone for OptimizationJobStatus
source§fn clone(&self) -> OptimizationJobStatus
fn clone(&self) -> OptimizationJobStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for OptimizationJobStatus
impl Debug for OptimizationJobStatus
source§impl Display for OptimizationJobStatus
impl Display for OptimizationJobStatus
source§impl From<&str> for OptimizationJobStatus
impl From<&str> for OptimizationJobStatus
source§impl FromStr for OptimizationJobStatus
impl FromStr for OptimizationJobStatus
source§impl Hash for OptimizationJobStatus
impl Hash for OptimizationJobStatus
source§impl Ord for OptimizationJobStatus
impl Ord for OptimizationJobStatus
source§fn cmp(&self, other: &OptimizationJobStatus) -> Ordering
fn cmp(&self, other: &OptimizationJobStatus) -> 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 OptimizationJobStatus
impl PartialEq for OptimizationJobStatus
source§impl PartialOrd for OptimizationJobStatus
impl PartialOrd for OptimizationJobStatus
impl Eq for OptimizationJobStatus
impl StructuralPartialEq for OptimizationJobStatus
Auto Trait Implementations§
impl Freeze for OptimizationJobStatus
impl RefUnwindSafe for OptimizationJobStatus
impl Send for OptimizationJobStatus
impl Sync for OptimizationJobStatus
impl Unpin for OptimizationJobStatus
impl UnwindSafe for OptimizationJobStatus
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<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit)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.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more