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