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