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