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