#[non_exhaustive]pub enum M2tsSegmentationStyle {
MaintainCadence,
ResetCadence,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against M2tsSegmentationStyle
, 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 m2tssegmentationstyle = unimplemented!();
match m2tssegmentationstyle {
M2tsSegmentationStyle::MaintainCadence => { /* ... */ },
M2tsSegmentationStyle::ResetCadence => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when m2tssegmentationstyle
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant M2tsSegmentationStyle::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
M2tsSegmentationStyle::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 M2tsSegmentationStyle::NewFeature
is defined.
Specifically, when m2tssegmentationstyle
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on M2tsSegmentationStyle::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. The segmentation style parameter controls how segmentation markers are inserted into the transport stream. With avails, it is possible that segments may be truncated, which can influence where future segmentation markers are inserted. When a segmentation style of “reset_cadence” is selected and a segment is truncated due to an avail, we will reset the segmentation cadence. This means the subsequent segment will have a duration of of $segmentation_time seconds. When a segmentation style of “maintain_cadence” is selected and a segment is truncated due to an avail, we will not reset the segmentation cadence. This means the subsequent segment will likely be truncated as well. However, all segments after that will have a duration of $segmentation_time seconds. Note that EBP lookahead is a slight exception to this rule.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
MaintainCadence
ResetCadence
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 M2tsSegmentationStyle
impl M2tsSegmentationStyle
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 M2tsSegmentationStyle
impl AsRef<str> for M2tsSegmentationStyle
source§impl Clone for M2tsSegmentationStyle
impl Clone for M2tsSegmentationStyle
source§fn clone(&self) -> M2tsSegmentationStyle
fn clone(&self) -> M2tsSegmentationStyle
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for M2tsSegmentationStyle
impl Debug for M2tsSegmentationStyle
source§impl Display for M2tsSegmentationStyle
impl Display for M2tsSegmentationStyle
source§impl From<&str> for M2tsSegmentationStyle
impl From<&str> for M2tsSegmentationStyle
source§impl FromStr for M2tsSegmentationStyle
impl FromStr for M2tsSegmentationStyle
source§impl Hash for M2tsSegmentationStyle
impl Hash for M2tsSegmentationStyle
source§impl Ord for M2tsSegmentationStyle
impl Ord for M2tsSegmentationStyle
source§fn cmp(&self, other: &M2tsSegmentationStyle) -> Ordering
fn cmp(&self, other: &M2tsSegmentationStyle) -> 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 M2tsSegmentationStyle
impl PartialEq for M2tsSegmentationStyle
source§fn eq(&self, other: &M2tsSegmentationStyle) -> bool
fn eq(&self, other: &M2tsSegmentationStyle) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for M2tsSegmentationStyle
impl PartialOrd for M2tsSegmentationStyle
source§fn partial_cmp(&self, other: &M2tsSegmentationStyle) -> Option<Ordering>
fn partial_cmp(&self, other: &M2tsSegmentationStyle) -> 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 M2tsSegmentationStyle
impl StructuralPartialEq for M2tsSegmentationStyle
Auto Trait Implementations§
impl Freeze for M2tsSegmentationStyle
impl RefUnwindSafe for M2tsSegmentationStyle
impl Send for M2tsSegmentationStyle
impl Sync for M2tsSegmentationStyle
impl Unpin for M2tsSegmentationStyle
impl UnwindSafe for M2tsSegmentationStyle
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