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