#[non_exhaustive]pub enum IsTrackingServerActive {
Active,
Inactive,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against IsTrackingServerActive, 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 istrackingserveractive = unimplemented!();
match istrackingserveractive {
IsTrackingServerActive::Active => { /* ... */ },
IsTrackingServerActive::Inactive => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when istrackingserveractive represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant IsTrackingServerActive::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
IsTrackingServerActive::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 IsTrackingServerActive::NewFeature is defined.
Specifically, when istrackingserveractive represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on IsTrackingServerActive::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
Active
Inactive
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 IsTrackingServerActive
impl IsTrackingServerActive
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 IsTrackingServerActive
impl AsRef<str> for IsTrackingServerActive
source§impl Clone for IsTrackingServerActive
impl Clone for IsTrackingServerActive
source§fn clone(&self) -> IsTrackingServerActive
fn clone(&self) -> IsTrackingServerActive
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for IsTrackingServerActive
impl Debug for IsTrackingServerActive
source§impl Display for IsTrackingServerActive
impl Display for IsTrackingServerActive
source§impl From<&str> for IsTrackingServerActive
impl From<&str> for IsTrackingServerActive
source§impl FromStr for IsTrackingServerActive
impl FromStr for IsTrackingServerActive
source§impl Hash for IsTrackingServerActive
impl Hash for IsTrackingServerActive
source§impl Ord for IsTrackingServerActive
impl Ord for IsTrackingServerActive
source§fn cmp(&self, other: &IsTrackingServerActive) -> Ordering
fn cmp(&self, other: &IsTrackingServerActive) -> 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 IsTrackingServerActive
impl PartialEq for IsTrackingServerActive
source§fn eq(&self, other: &IsTrackingServerActive) -> bool
fn eq(&self, other: &IsTrackingServerActive) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for IsTrackingServerActive
impl PartialOrd for IsTrackingServerActive
source§fn partial_cmp(&self, other: &IsTrackingServerActive) -> Option<Ordering>
fn partial_cmp(&self, other: &IsTrackingServerActive) -> 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 IsTrackingServerActive
impl StructuralPartialEq for IsTrackingServerActive
Auto Trait Implementations§
impl Freeze for IsTrackingServerActive
impl RefUnwindSafe for IsTrackingServerActive
impl Send for IsTrackingServerActive
impl Sync for IsTrackingServerActive
impl Unpin for IsTrackingServerActive
impl UnwindSafe for IsTrackingServerActive
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
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more