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