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