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