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