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