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