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