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