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