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