#[non_exhaustive]pub enum HlsCodecSpecification {
Rfc4281,
Rfc6381,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HlsCodecSpecification
, 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 hlscodecspecification = unimplemented!();
match hlscodecspecification {
HlsCodecSpecification::Rfc4281 => { /* ... */ },
HlsCodecSpecification::Rfc6381 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when hlscodecspecification
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HlsCodecSpecification::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HlsCodecSpecification::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 HlsCodecSpecification::NewFeature
is defined.
Specifically, when hlscodecspecification
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HlsCodecSpecification::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. Specification to use (RFC-6381 or the default RFC-4281) during m3u8 playlist generation.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Rfc4281
Rfc6381
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 HlsCodecSpecification
impl HlsCodecSpecification
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 HlsCodecSpecification
impl AsRef<str> for HlsCodecSpecification
source§impl Clone for HlsCodecSpecification
impl Clone for HlsCodecSpecification
source§fn clone(&self) -> HlsCodecSpecification
fn clone(&self) -> HlsCodecSpecification
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HlsCodecSpecification
impl Debug for HlsCodecSpecification
source§impl Display for HlsCodecSpecification
impl Display for HlsCodecSpecification
source§impl From<&str> for HlsCodecSpecification
impl From<&str> for HlsCodecSpecification
source§impl FromStr for HlsCodecSpecification
impl FromStr for HlsCodecSpecification
source§impl Hash for HlsCodecSpecification
impl Hash for HlsCodecSpecification
source§impl Ord for HlsCodecSpecification
impl Ord for HlsCodecSpecification
source§fn cmp(&self, other: &HlsCodecSpecification) -> Ordering
fn cmp(&self, other: &HlsCodecSpecification) -> 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 HlsCodecSpecification
impl PartialEq for HlsCodecSpecification
source§fn eq(&self, other: &HlsCodecSpecification) -> bool
fn eq(&self, other: &HlsCodecSpecification) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for HlsCodecSpecification
impl PartialOrd for HlsCodecSpecification
source§fn partial_cmp(&self, other: &HlsCodecSpecification) -> Option<Ordering>
fn partial_cmp(&self, other: &HlsCodecSpecification) -> 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 HlsCodecSpecification
impl StructuralPartialEq for HlsCodecSpecification
Auto Trait Implementations§
impl Freeze for HlsCodecSpecification
impl RefUnwindSafe for HlsCodecSpecification
impl Send for HlsCodecSpecification
impl Sync for HlsCodecSpecification
impl Unpin for HlsCodecSpecification
impl UnwindSafe for HlsCodecSpecification
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