#[non_exhaustive]pub enum DataRepositoryLifecycle {
Available,
Creating,
Deleting,
Failed,
Misconfigured,
Updating,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DataRepositoryLifecycle
, 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 datarepositorylifecycle = unimplemented!();
match datarepositorylifecycle {
DataRepositoryLifecycle::Available => { /* ... */ },
DataRepositoryLifecycle::Creating => { /* ... */ },
DataRepositoryLifecycle::Deleting => { /* ... */ },
DataRepositoryLifecycle::Failed => { /* ... */ },
DataRepositoryLifecycle::Misconfigured => { /* ... */ },
DataRepositoryLifecycle::Updating => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when datarepositorylifecycle
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DataRepositoryLifecycle::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DataRepositoryLifecycle::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 DataRepositoryLifecycle::NewFeature
is defined.
Specifically, when datarepositorylifecycle
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DataRepositoryLifecycle::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
Available
Creating
Deleting
Failed
Misconfigured
Updating
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 DataRepositoryLifecycle
impl DataRepositoryLifecycle
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 DataRepositoryLifecycle
impl AsRef<str> for DataRepositoryLifecycle
source§impl Clone for DataRepositoryLifecycle
impl Clone for DataRepositoryLifecycle
source§fn clone(&self) -> DataRepositoryLifecycle
fn clone(&self) -> DataRepositoryLifecycle
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DataRepositoryLifecycle
impl Debug for DataRepositoryLifecycle
source§impl Display for DataRepositoryLifecycle
impl Display for DataRepositoryLifecycle
source§impl From<&str> for DataRepositoryLifecycle
impl From<&str> for DataRepositoryLifecycle
source§impl FromStr for DataRepositoryLifecycle
impl FromStr for DataRepositoryLifecycle
source§impl Hash for DataRepositoryLifecycle
impl Hash for DataRepositoryLifecycle
source§impl Ord for DataRepositoryLifecycle
impl Ord for DataRepositoryLifecycle
source§fn cmp(&self, other: &DataRepositoryLifecycle) -> Ordering
fn cmp(&self, other: &DataRepositoryLifecycle) -> 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 DataRepositoryLifecycle
impl PartialEq for DataRepositoryLifecycle
source§fn eq(&self, other: &DataRepositoryLifecycle) -> bool
fn eq(&self, other: &DataRepositoryLifecycle) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DataRepositoryLifecycle
impl PartialOrd for DataRepositoryLifecycle
source§fn partial_cmp(&self, other: &DataRepositoryLifecycle) -> Option<Ordering>
fn partial_cmp(&self, other: &DataRepositoryLifecycle) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for DataRepositoryLifecycle
impl StructuralPartialEq for DataRepositoryLifecycle
Auto Trait Implementations§
impl Freeze for DataRepositoryLifecycle
impl RefUnwindSafe for DataRepositoryLifecycle
impl Send for DataRepositoryLifecycle
impl Sync for DataRepositoryLifecycle
impl Unpin for DataRepositoryLifecycle
impl UnwindSafe for DataRepositoryLifecycle
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<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.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more