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