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