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