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