Enum bonsaidb::keystorage::s3::aws_sdk_s3::types::MetricsStatus
#[non_exhaustive]pub enum MetricsStatus {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MetricsStatus
, 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 metricsstatus = unimplemented!();
match metricsstatus {
MetricsStatus::Disabled => { /* ... */ },
MetricsStatus::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when metricsstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MetricsStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MetricsStatus::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 MetricsStatus::NewFeature
is defined.
Specifically, when metricsstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MetricsStatus::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
Disabled
Enabled
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
§impl AsRef<str> for MetricsStatus
impl AsRef<str> for MetricsStatus
§impl Clone for MetricsStatus
impl Clone for MetricsStatus
§fn clone(&self) -> MetricsStatus
fn clone(&self) -> MetricsStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl Debug for MetricsStatus
impl Debug for MetricsStatus
§impl From<&str> for MetricsStatus
impl From<&str> for MetricsStatus
§fn from(s: &str) -> MetricsStatus
fn from(s: &str) -> MetricsStatus
§impl FromStr for MetricsStatus
impl FromStr for MetricsStatus
§type Err = Infallible
type Err = Infallible
§fn from_str(s: &str) -> Result<MetricsStatus, <MetricsStatus as FromStr>::Err>
fn from_str(s: &str) -> Result<MetricsStatus, <MetricsStatus as FromStr>::Err>
s
to return a value of this type. Read more§impl Hash for MetricsStatus
impl Hash for MetricsStatus
§impl Ord for MetricsStatus
impl Ord for MetricsStatus
§impl PartialEq for MetricsStatus
impl PartialEq for MetricsStatus
§fn eq(&self, other: &MetricsStatus) -> bool
fn eq(&self, other: &MetricsStatus) -> bool
self
and other
values to be equal, and is used
by ==
.§impl PartialOrd for MetricsStatus
impl PartialOrd for MetricsStatus
§fn partial_cmp(&self, other: &MetricsStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &MetricsStatus) -> 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 MetricsStatus
impl StructuralEq for MetricsStatus
impl StructuralPartialEq for MetricsStatus
Auto Trait Implementations§
impl RefUnwindSafe for MetricsStatus
impl Send for MetricsStatus
impl Sync for MetricsStatus
impl Unpin for MetricsStatus
impl UnwindSafe for MetricsStatus
Blanket Implementations§
§impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
§impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
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
§impl<T> CallHasher for T
impl<T> CallHasher for T
§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.