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