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