Enum aws_sdk_opsworkscm::types::ServerStatus
source · #[non_exhaustive]pub enum ServerStatus {
Show 14 variants
BackingUp,
ConnectionLost,
Creating,
Deleting,
Failed,
Healthy,
Modifying,
Restoring,
Running,
Setup,
Terminated,
UnderMaintenance,
Unhealthy,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ServerStatus
, 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 serverstatus = unimplemented!();
match serverstatus {
ServerStatus::BackingUp => { /* ... */ },
ServerStatus::ConnectionLost => { /* ... */ },
ServerStatus::Creating => { /* ... */ },
ServerStatus::Deleting => { /* ... */ },
ServerStatus::Failed => { /* ... */ },
ServerStatus::Healthy => { /* ... */ },
ServerStatus::Modifying => { /* ... */ },
ServerStatus::Restoring => { /* ... */ },
ServerStatus::Running => { /* ... */ },
ServerStatus::Setup => { /* ... */ },
ServerStatus::Terminated => { /* ... */ },
ServerStatus::UnderMaintenance => { /* ... */ },
ServerStatus::Unhealthy => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when serverstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ServerStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ServerStatus::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 ServerStatus::NewFeature
is defined.
Specifically, when serverstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ServerStatus::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
BackingUp
ConnectionLost
Creating
Deleting
Failed
Healthy
Modifying
Restoring
Running
Setup
Terminated
UnderMaintenance
Unhealthy
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 ServerStatus
impl ServerStatus
source§impl ServerStatus
impl ServerStatus
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 ServerStatus
impl AsRef<str> for ServerStatus
source§impl Clone for ServerStatus
impl Clone for ServerStatus
source§fn clone(&self) -> ServerStatus
fn clone(&self) -> ServerStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ServerStatus
impl Debug for ServerStatus
source§impl Display for ServerStatus
impl Display for ServerStatus
source§impl From<&str> for ServerStatus
impl From<&str> for ServerStatus
source§impl FromStr for ServerStatus
impl FromStr for ServerStatus
source§impl Hash for ServerStatus
impl Hash for ServerStatus
source§impl Ord for ServerStatus
impl Ord for ServerStatus
source§fn cmp(&self, other: &ServerStatus) -> Ordering
fn cmp(&self, other: &ServerStatus) -> 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 ServerStatus
impl PartialEq for ServerStatus
source§fn eq(&self, other: &ServerStatus) -> bool
fn eq(&self, other: &ServerStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ServerStatus
impl PartialOrd for ServerStatus
source§fn partial_cmp(&self, other: &ServerStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &ServerStatus) -> 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 ServerStatus
impl StructuralPartialEq for ServerStatus
Auto Trait Implementations§
impl Freeze for ServerStatus
impl RefUnwindSafe for ServerStatus
impl Send for ServerStatus
impl Sync for ServerStatus
impl Unpin for ServerStatus
impl UnwindSafe for ServerStatus
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