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