Enum aws_sdk_kinesis::model::ConsumerStatus
source · #[non_exhaustive]
pub enum ConsumerStatus {
Active,
Creating,
Deleting,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ConsumerStatus
, 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 consumerstatus = unimplemented!();
match consumerstatus {
ConsumerStatus::Active => { /* ... */ },
ConsumerStatus::Creating => { /* ... */ },
ConsumerStatus::Deleting => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when consumerstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ConsumerStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ConsumerStatus::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 ConsumerStatus::NewFeature
is defined.
Specifically, when consumerstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ConsumerStatus::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
Active
Creating
Deleting
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for ConsumerStatus
impl AsRef<str> for ConsumerStatus
source§impl Clone for ConsumerStatus
impl Clone for ConsumerStatus
source§fn clone(&self) -> ConsumerStatus
fn clone(&self) -> ConsumerStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ConsumerStatus
impl Debug for ConsumerStatus
source§impl From<&str> for ConsumerStatus
impl From<&str> for ConsumerStatus
source§impl FromStr for ConsumerStatus
impl FromStr for ConsumerStatus
source§impl Hash for ConsumerStatus
impl Hash for ConsumerStatus
source§impl Ord for ConsumerStatus
impl Ord for ConsumerStatus
source§fn cmp(&self, other: &ConsumerStatus) -> Ordering
fn cmp(&self, other: &ConsumerStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<ConsumerStatus> for ConsumerStatus
impl PartialEq<ConsumerStatus> for ConsumerStatus
source§fn eq(&self, other: &ConsumerStatus) -> bool
fn eq(&self, other: &ConsumerStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<ConsumerStatus> for ConsumerStatus
impl PartialOrd<ConsumerStatus> for ConsumerStatus
source§fn partial_cmp(&self, other: &ConsumerStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &ConsumerStatus) -> 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 ConsumerStatus
impl StructuralEq for ConsumerStatus
impl StructuralPartialEq for ConsumerStatus
Auto Trait Implementations§
impl RefUnwindSafe for ConsumerStatus
impl Send for ConsumerStatus
impl Sync for ConsumerStatus
impl Unpin for ConsumerStatus
impl UnwindSafe for ConsumerStatus
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.