Enum aws_sdk_s3::types::MfaDeleteStatus
source · #[non_exhaustive]pub enum MfaDeleteStatus {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MfaDeleteStatus
, 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 mfadeletestatus = unimplemented!();
match mfadeletestatus {
MfaDeleteStatus::Disabled => { /* ... */ },
MfaDeleteStatus::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when mfadeletestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MfaDeleteStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MfaDeleteStatus::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 MfaDeleteStatus::NewFeature
is defined.
Specifically, when mfadeletestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MfaDeleteStatus::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
Disabled
Enabled
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 MfaDeleteStatus
impl MfaDeleteStatus
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 MfaDeleteStatus
impl AsRef<str> for MfaDeleteStatus
source§impl Clone for MfaDeleteStatus
impl Clone for MfaDeleteStatus
source§fn clone(&self) -> MfaDeleteStatus
fn clone(&self) -> MfaDeleteStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for MfaDeleteStatus
impl Debug for MfaDeleteStatus
source§impl Display for MfaDeleteStatus
impl Display for MfaDeleteStatus
source§impl From<&str> for MfaDeleteStatus
impl From<&str> for MfaDeleteStatus
source§impl FromStr for MfaDeleteStatus
impl FromStr for MfaDeleteStatus
source§impl Hash for MfaDeleteStatus
impl Hash for MfaDeleteStatus
source§impl Ord for MfaDeleteStatus
impl Ord for MfaDeleteStatus
source§fn cmp(&self, other: &MfaDeleteStatus) -> Ordering
fn cmp(&self, other: &MfaDeleteStatus) -> 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 MfaDeleteStatus
impl PartialEq for MfaDeleteStatus
source§impl PartialOrd for MfaDeleteStatus
impl PartialOrd for MfaDeleteStatus
impl Eq for MfaDeleteStatus
impl StructuralPartialEq for MfaDeleteStatus
Auto Trait Implementations§
impl Freeze for MfaDeleteStatus
impl RefUnwindSafe for MfaDeleteStatus
impl Send for MfaDeleteStatus
impl Sync for MfaDeleteStatus
impl Unpin for MfaDeleteStatus
impl UnwindSafe for MfaDeleteStatus
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.