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