#[non_exhaustive]pub enum HlsDisplayFragmentTimestamp {
Always,
Never,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HlsDisplayFragmentTimestamp
, 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 hlsdisplayfragmenttimestamp = unimplemented!();
match hlsdisplayfragmenttimestamp {
HlsDisplayFragmentTimestamp::Always => { /* ... */ },
HlsDisplayFragmentTimestamp::Never => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when hlsdisplayfragmenttimestamp
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HlsDisplayFragmentTimestamp::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HlsDisplayFragmentTimestamp::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 HlsDisplayFragmentTimestamp::NewFeature
is defined.
Specifically, when hlsdisplayfragmenttimestamp
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HlsDisplayFragmentTimestamp::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
Always
Never
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for HlsDisplayFragmentTimestamp
impl AsRef<str> for HlsDisplayFragmentTimestamp
source§impl Clone for HlsDisplayFragmentTimestamp
impl Clone for HlsDisplayFragmentTimestamp
source§fn clone(&self) -> HlsDisplayFragmentTimestamp
fn clone(&self) -> HlsDisplayFragmentTimestamp
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HlsDisplayFragmentTimestamp
impl Debug for HlsDisplayFragmentTimestamp
source§impl From<&str> for HlsDisplayFragmentTimestamp
impl From<&str> for HlsDisplayFragmentTimestamp
source§impl Hash for HlsDisplayFragmentTimestamp
impl Hash for HlsDisplayFragmentTimestamp
source§impl Ord for HlsDisplayFragmentTimestamp
impl Ord for HlsDisplayFragmentTimestamp
source§fn cmp(&self, other: &HlsDisplayFragmentTimestamp) -> Ordering
fn cmp(&self, other: &HlsDisplayFragmentTimestamp) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<HlsDisplayFragmentTimestamp> for HlsDisplayFragmentTimestamp
impl PartialEq<HlsDisplayFragmentTimestamp> for HlsDisplayFragmentTimestamp
source§fn eq(&self, other: &HlsDisplayFragmentTimestamp) -> bool
fn eq(&self, other: &HlsDisplayFragmentTimestamp) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<HlsDisplayFragmentTimestamp> for HlsDisplayFragmentTimestamp
impl PartialOrd<HlsDisplayFragmentTimestamp> for HlsDisplayFragmentTimestamp
source§fn partial_cmp(&self, other: &HlsDisplayFragmentTimestamp) -> Option<Ordering>
fn partial_cmp(&self, other: &HlsDisplayFragmentTimestamp) -> 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 HlsDisplayFragmentTimestamp
impl StructuralEq for HlsDisplayFragmentTimestamp
impl StructuralPartialEq for HlsDisplayFragmentTimestamp
Auto Trait Implementations§
impl RefUnwindSafe for HlsDisplayFragmentTimestamp
impl Send for HlsDisplayFragmentTimestamp
impl Sync for HlsDisplayFragmentTimestamp
impl Unpin for HlsDisplayFragmentTimestamp
impl UnwindSafe for HlsDisplayFragmentTimestamp
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.