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