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