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