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