#[non_exhaustive]pub enum DedicatedTenancySupportResultEnum {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DedicatedTenancySupportResultEnum
, 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 dedicatedtenancysupportresultenum = unimplemented!();
match dedicatedtenancysupportresultenum {
DedicatedTenancySupportResultEnum::Disabled => { /* ... */ },
DedicatedTenancySupportResultEnum::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when dedicatedtenancysupportresultenum
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DedicatedTenancySupportResultEnum::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DedicatedTenancySupportResultEnum::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 DedicatedTenancySupportResultEnum::NewFeature
is defined.
Specifically, when dedicatedtenancysupportresultenum
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DedicatedTenancySupportResultEnum::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
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for DedicatedTenancySupportResultEnum
impl AsRef<str> for DedicatedTenancySupportResultEnum
source§impl Clone for DedicatedTenancySupportResultEnum
impl Clone for DedicatedTenancySupportResultEnum
source§fn clone(&self) -> DedicatedTenancySupportResultEnum
fn clone(&self) -> DedicatedTenancySupportResultEnum
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for DedicatedTenancySupportResultEnum
impl From<&str> for DedicatedTenancySupportResultEnum
source§impl Ord for DedicatedTenancySupportResultEnum
impl Ord for DedicatedTenancySupportResultEnum
source§fn cmp(&self, other: &DedicatedTenancySupportResultEnum) -> Ordering
fn cmp(&self, other: &DedicatedTenancySupportResultEnum) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<DedicatedTenancySupportResultEnum> for DedicatedTenancySupportResultEnum
impl PartialEq<DedicatedTenancySupportResultEnum> for DedicatedTenancySupportResultEnum
source§fn eq(&self, other: &DedicatedTenancySupportResultEnum) -> bool
fn eq(&self, other: &DedicatedTenancySupportResultEnum) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<DedicatedTenancySupportResultEnum> for DedicatedTenancySupportResultEnum
impl PartialOrd<DedicatedTenancySupportResultEnum> for DedicatedTenancySupportResultEnum
source§fn partial_cmp(
&self,
other: &DedicatedTenancySupportResultEnum
) -> Option<Ordering>
fn partial_cmp( &self, other: &DedicatedTenancySupportResultEnum ) -> 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 DedicatedTenancySupportResultEnum
impl StructuralEq for DedicatedTenancySupportResultEnum
impl StructuralPartialEq for DedicatedTenancySupportResultEnum
Auto Trait Implementations§
impl RefUnwindSafe for DedicatedTenancySupportResultEnum
impl Send for DedicatedTenancySupportResultEnum
impl Sync for DedicatedTenancySupportResultEnum
impl Unpin for DedicatedTenancySupportResultEnum
impl UnwindSafe for DedicatedTenancySupportResultEnum
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> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.