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