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