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