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