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