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