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