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