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