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