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