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