#[non_exhaustive]
pub enum OnPartialBatchItemFailureStreams {
AutomaticBisect,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against OnPartialBatchItemFailureStreams
, 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 onpartialbatchitemfailurestreams = unimplemented!();
match onpartialbatchitemfailurestreams {
OnPartialBatchItemFailureStreams::AutomaticBisect => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when onpartialbatchitemfailurestreams
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant OnPartialBatchItemFailureStreams::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
OnPartialBatchItemFailureStreams::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 OnPartialBatchItemFailureStreams::NewFeature
is defined.
Specifically, when onpartialbatchitemfailurestreams
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on OnPartialBatchItemFailureStreams::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
AutomaticBisect
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for OnPartialBatchItemFailureStreams
impl AsRef<str> for OnPartialBatchItemFailureStreams
source§impl Clone for OnPartialBatchItemFailureStreams
impl Clone for OnPartialBatchItemFailureStreams
source§fn clone(&self) -> OnPartialBatchItemFailureStreams
fn clone(&self) -> OnPartialBatchItemFailureStreams
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for OnPartialBatchItemFailureStreams
impl From<&str> for OnPartialBatchItemFailureStreams
source§impl Ord for OnPartialBatchItemFailureStreams
impl Ord for OnPartialBatchItemFailureStreams
source§fn cmp(&self, other: &OnPartialBatchItemFailureStreams) -> Ordering
fn cmp(&self, other: &OnPartialBatchItemFailureStreams) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<OnPartialBatchItemFailureStreams> for OnPartialBatchItemFailureStreams
impl PartialEq<OnPartialBatchItemFailureStreams> for OnPartialBatchItemFailureStreams
source§fn eq(&self, other: &OnPartialBatchItemFailureStreams) -> bool
fn eq(&self, other: &OnPartialBatchItemFailureStreams) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<OnPartialBatchItemFailureStreams> for OnPartialBatchItemFailureStreams
impl PartialOrd<OnPartialBatchItemFailureStreams> for OnPartialBatchItemFailureStreams
source§fn partial_cmp(
&self,
other: &OnPartialBatchItemFailureStreams
) -> Option<Ordering>
fn partial_cmp(
&self,
other: &OnPartialBatchItemFailureStreams
) -> 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 OnPartialBatchItemFailureStreams
impl StructuralEq for OnPartialBatchItemFailureStreams
impl StructuralPartialEq for OnPartialBatchItemFailureStreams
Auto Trait Implementations§
impl RefUnwindSafe for OnPartialBatchItemFailureStreams
impl Send for OnPartialBatchItemFailureStreams
impl Sync for OnPartialBatchItemFailureStreams
impl Unpin for OnPartialBatchItemFailureStreams
impl UnwindSafe for OnPartialBatchItemFailureStreams
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.