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