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