#[non_exhaustive]pub enum DeepHealthCheckType {
InstanceConnectivity,
InstanceStress,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against DeepHealthCheckType, 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 deephealthchecktype = unimplemented!();
match deephealthchecktype {
DeepHealthCheckType::InstanceConnectivity => { /* ... */ },
DeepHealthCheckType::InstanceStress => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when deephealthchecktype represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DeepHealthCheckType::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
DeepHealthCheckType::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 DeepHealthCheckType::NewFeature is defined.
Specifically, when deephealthchecktype represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on DeepHealthCheckType::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis 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
InstanceConnectivity
InstanceStress
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 DeepHealthCheckType
impl DeepHealthCheckType
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 DeepHealthCheckType
impl AsRef<str> for DeepHealthCheckType
source§impl Clone for DeepHealthCheckType
impl Clone for DeepHealthCheckType
source§fn clone(&self) -> DeepHealthCheckType
fn clone(&self) -> DeepHealthCheckType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for DeepHealthCheckType
impl Debug for DeepHealthCheckType
source§impl Display for DeepHealthCheckType
impl Display for DeepHealthCheckType
source§impl From<&str> for DeepHealthCheckType
impl From<&str> for DeepHealthCheckType
source§impl FromStr for DeepHealthCheckType
impl FromStr for DeepHealthCheckType
source§impl Hash for DeepHealthCheckType
impl Hash for DeepHealthCheckType
source§impl Ord for DeepHealthCheckType
impl Ord for DeepHealthCheckType
source§fn cmp(&self, other: &DeepHealthCheckType) -> Ordering
fn cmp(&self, other: &DeepHealthCheckType) -> 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 DeepHealthCheckType
impl PartialEq for DeepHealthCheckType
source§impl PartialOrd for DeepHealthCheckType
impl PartialOrd for DeepHealthCheckType
impl Eq for DeepHealthCheckType
impl StructuralPartialEq for DeepHealthCheckType
Auto Trait Implementations§
impl Freeze for DeepHealthCheckType
impl RefUnwindSafe for DeepHealthCheckType
impl Send for DeepHealthCheckType
impl Sync for DeepHealthCheckType
impl Unpin for DeepHealthCheckType
impl UnwindSafe for DeepHealthCheckType
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<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit)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