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