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