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