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