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