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