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