#[non_exhaustive]pub enum DetailedModelPackageStatus {
Completed,
Failed,
InProgress,
NotStarted,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DetailedModelPackageStatus
, 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 detailedmodelpackagestatus = unimplemented!();
match detailedmodelpackagestatus {
DetailedModelPackageStatus::Completed => { /* ... */ },
DetailedModelPackageStatus::Failed => { /* ... */ },
DetailedModelPackageStatus::InProgress => { /* ... */ },
DetailedModelPackageStatus::NotStarted => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when detailedmodelpackagestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DetailedModelPackageStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DetailedModelPackageStatus::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 DetailedModelPackageStatus::NewFeature
is defined.
Specifically, when detailedmodelpackagestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DetailedModelPackageStatus::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
NotStarted
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 DetailedModelPackageStatus
impl DetailedModelPackageStatus
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 DetailedModelPackageStatus
impl AsRef<str> for DetailedModelPackageStatus
source§impl Clone for DetailedModelPackageStatus
impl Clone for DetailedModelPackageStatus
source§fn clone(&self) -> DetailedModelPackageStatus
fn clone(&self) -> DetailedModelPackageStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DetailedModelPackageStatus
impl Debug for DetailedModelPackageStatus
source§impl Display for DetailedModelPackageStatus
impl Display for DetailedModelPackageStatus
source§impl From<&str> for DetailedModelPackageStatus
impl From<&str> for DetailedModelPackageStatus
source§impl FromStr for DetailedModelPackageStatus
impl FromStr for DetailedModelPackageStatus
source§impl Hash for DetailedModelPackageStatus
impl Hash for DetailedModelPackageStatus
source§impl Ord for DetailedModelPackageStatus
impl Ord for DetailedModelPackageStatus
source§fn cmp(&self, other: &DetailedModelPackageStatus) -> Ordering
fn cmp(&self, other: &DetailedModelPackageStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialOrd for DetailedModelPackageStatus
impl PartialOrd for DetailedModelPackageStatus
impl Eq for DetailedModelPackageStatus
impl StructuralPartialEq for DetailedModelPackageStatus
Auto Trait Implementations§
impl Freeze for DetailedModelPackageStatus
impl RefUnwindSafe for DetailedModelPackageStatus
impl Send for DetailedModelPackageStatus
impl Sync for DetailedModelPackageStatus
impl Unpin for DetailedModelPackageStatus
impl UnwindSafe for DetailedModelPackageStatus
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§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default 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