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