#[non_exhaustive]pub enum HlsClientCache {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HlsClientCache
, 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 hlsclientcache = unimplemented!();
match hlsclientcache {
HlsClientCache::Disabled => { /* ... */ },
HlsClientCache::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when hlsclientcache
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HlsClientCache::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HlsClientCache::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 HlsClientCache::NewFeature
is defined.
Specifically, when hlsclientcache
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HlsClientCache::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. Disable this setting only when your workflow requires the #EXT-X-ALLOW-CACHE:no tag. Otherwise, keep the default value Enabled and control caching in your video distribution set up. For example, use the Cache-Control http header.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Disabled
Enabled
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 HlsClientCache
impl HlsClientCache
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 HlsClientCache
impl AsRef<str> for HlsClientCache
source§impl Clone for HlsClientCache
impl Clone for HlsClientCache
source§fn clone(&self) -> HlsClientCache
fn clone(&self) -> HlsClientCache
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HlsClientCache
impl Debug for HlsClientCache
source§impl Display for HlsClientCache
impl Display for HlsClientCache
source§impl From<&str> for HlsClientCache
impl From<&str> for HlsClientCache
source§impl FromStr for HlsClientCache
impl FromStr for HlsClientCache
source§impl Hash for HlsClientCache
impl Hash for HlsClientCache
source§impl Ord for HlsClientCache
impl Ord for HlsClientCache
source§fn cmp(&self, other: &HlsClientCache) -> Ordering
fn cmp(&self, other: &HlsClientCache) -> 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 HlsClientCache
impl PartialEq for HlsClientCache
source§fn eq(&self, other: &HlsClientCache) -> bool
fn eq(&self, other: &HlsClientCache) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for HlsClientCache
impl PartialOrd for HlsClientCache
source§fn partial_cmp(&self, other: &HlsClientCache) -> Option<Ordering>
fn partial_cmp(&self, other: &HlsClientCache) -> 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 HlsClientCache
impl StructuralPartialEq for HlsClientCache
Auto Trait Implementations§
impl Freeze for HlsClientCache
impl RefUnwindSafe for HlsClientCache
impl Send for HlsClientCache
impl Sync for HlsClientCache
impl Unpin for HlsClientCache
impl UnwindSafe for HlsClientCache
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.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more