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