#[non_exhaustive]pub enum HlsProgramDateTime {
Exclude,
Include,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HlsProgramDateTime
, 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 hlsprogramdatetime = unimplemented!();
match hlsprogramdatetime {
HlsProgramDateTime::Exclude => { /* ... */ },
HlsProgramDateTime::Include => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when hlsprogramdatetime
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HlsProgramDateTime::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HlsProgramDateTime::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 HlsProgramDateTime::NewFeature
is defined.
Specifically, when hlsprogramdatetime
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HlsProgramDateTime::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. Includes or excludes EXT-X-PROGRAM-DATE-TIME tag in .m3u8 manifest files. The value is calculated as follows: either the program date and time are initialized using the input timecode source, or the time is initialized using the input timecode source and the date is initialized using the timestamp_offset.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Exclude
Include
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 HlsProgramDateTime
impl HlsProgramDateTime
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 HlsProgramDateTime
impl AsRef<str> for HlsProgramDateTime
source§impl Clone for HlsProgramDateTime
impl Clone for HlsProgramDateTime
source§fn clone(&self) -> HlsProgramDateTime
fn clone(&self) -> HlsProgramDateTime
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HlsProgramDateTime
impl Debug for HlsProgramDateTime
source§impl Display for HlsProgramDateTime
impl Display for HlsProgramDateTime
source§impl From<&str> for HlsProgramDateTime
impl From<&str> for HlsProgramDateTime
source§impl FromStr for HlsProgramDateTime
impl FromStr for HlsProgramDateTime
source§impl Hash for HlsProgramDateTime
impl Hash for HlsProgramDateTime
source§impl Ord for HlsProgramDateTime
impl Ord for HlsProgramDateTime
source§fn cmp(&self, other: &HlsProgramDateTime) -> Ordering
fn cmp(&self, other: &HlsProgramDateTime) -> 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 HlsProgramDateTime
impl PartialEq for HlsProgramDateTime
source§fn eq(&self, other: &HlsProgramDateTime) -> bool
fn eq(&self, other: &HlsProgramDateTime) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for HlsProgramDateTime
impl PartialOrd for HlsProgramDateTime
source§fn partial_cmp(&self, other: &HlsProgramDateTime) -> Option<Ordering>
fn partial_cmp(&self, other: &HlsProgramDateTime) -> 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 HlsProgramDateTime
impl StructuralPartialEq for HlsProgramDateTime
Auto Trait Implementations§
impl Freeze for HlsProgramDateTime
impl RefUnwindSafe for HlsProgramDateTime
impl Send for HlsProgramDateTime
impl Sync for HlsProgramDateTime
impl Unpin for HlsProgramDateTime
impl UnwindSafe for HlsProgramDateTime
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