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