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