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