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