Enum aws_sdk_s3::types::ReplicationRuleStatus
source · #[non_exhaustive]pub enum ReplicationRuleStatus {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ReplicationRuleStatus
, 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 replicationrulestatus = unimplemented!();
match replicationrulestatus {
ReplicationRuleStatus::Disabled => { /* ... */ },
ReplicationRuleStatus::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when replicationrulestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ReplicationRuleStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ReplicationRuleStatus::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 ReplicationRuleStatus::NewFeature
is defined.
Specifically, when replicationrulestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ReplicationRuleStatus::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
. 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 ReplicationRuleStatus
impl ReplicationRuleStatus
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 ReplicationRuleStatus
impl AsRef<str> for ReplicationRuleStatus
source§impl Clone for ReplicationRuleStatus
impl Clone for ReplicationRuleStatus
source§fn clone(&self) -> ReplicationRuleStatus
fn clone(&self) -> ReplicationRuleStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ReplicationRuleStatus
impl Debug for ReplicationRuleStatus
source§impl Display for ReplicationRuleStatus
impl Display for ReplicationRuleStatus
source§impl From<&str> for ReplicationRuleStatus
impl From<&str> for ReplicationRuleStatus
source§impl FromStr for ReplicationRuleStatus
impl FromStr for ReplicationRuleStatus
source§impl Hash for ReplicationRuleStatus
impl Hash for ReplicationRuleStatus
source§impl Ord for ReplicationRuleStatus
impl Ord for ReplicationRuleStatus
source§fn cmp(&self, other: &ReplicationRuleStatus) -> Ordering
fn cmp(&self, other: &ReplicationRuleStatus) -> 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 ReplicationRuleStatus
impl PartialEq for ReplicationRuleStatus
source§impl PartialOrd for ReplicationRuleStatus
impl PartialOrd for ReplicationRuleStatus
impl Eq for ReplicationRuleStatus
impl StructuralPartialEq for ReplicationRuleStatus
Auto Trait Implementations§
impl Freeze for ReplicationRuleStatus
impl RefUnwindSafe for ReplicationRuleStatus
impl Send for ReplicationRuleStatus
impl Sync for ReplicationRuleStatus
impl Unpin for ReplicationRuleStatus
impl UnwindSafe for ReplicationRuleStatus
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§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default 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.