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