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