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