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