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