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