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