Enum aws_sdk_batch::types::CeStatus
source · #[non_exhaustive]pub enum CeStatus {
Creating,
Deleted,
Deleting,
Invalid,
Updating,
Valid,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against CeStatus
, 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 cestatus = unimplemented!();
match cestatus {
CeStatus::Creating => { /* ... */ },
CeStatus::Deleted => { /* ... */ },
CeStatus::Deleting => { /* ... */ },
CeStatus::Invalid => { /* ... */ },
CeStatus::Updating => { /* ... */ },
CeStatus::Valid => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when cestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant CeStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
CeStatus::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 CeStatus::NewFeature
is defined.
Specifically, when cestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on CeStatus::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
Creating
Deleted
Deleting
Invalid
Updating
Valid
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl Ord for CeStatus
impl Ord for CeStatus
source§impl PartialEq<CeStatus> for CeStatus
impl PartialEq<CeStatus> for CeStatus
source§impl PartialOrd<CeStatus> for CeStatus
impl PartialOrd<CeStatus> for CeStatus
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 CeStatus
impl StructuralEq for CeStatus
impl StructuralPartialEq for CeStatus
Auto Trait Implementations§
impl RefUnwindSafe for CeStatus
impl Send for CeStatus
impl Sync for CeStatus
impl Unpin for CeStatus
impl UnwindSafe for CeStatus
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.