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