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