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