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