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