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