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