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