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