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