#[non_exhaustive]pub enum ImscAccessibilitySubs {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ImscAccessibilitySubs
, 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 imscaccessibilitysubs = unimplemented!();
match imscaccessibilitysubs {
ImscAccessibilitySubs::Disabled => { /* ... */ },
ImscAccessibilitySubs::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when imscaccessibilitysubs
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ImscAccessibilitySubs::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ImscAccessibilitySubs::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 ImscAccessibilitySubs::NewFeature
is defined.
Specifically, when imscaccessibilitysubs
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ImscAccessibilitySubs::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.
If the IMSC captions track is intended to provide accessibility for people who are deaf or hard of hearing: Set Accessibility subtitles to Enabled. When you do, MediaConvert adds accessibility attributes to your output HLS or DASH manifest. For HLS manifests, MediaConvert adds the following accessibility attributes under EXT-X-MEDIA for this track: CHARACTERISTICS=“public.accessibility.describes-spoken-dialog,public.accessibility.describes-music-and-sound” and AUTOSELECT=“YES”. For DASH manifests, MediaConvert adds the following in the adaptation set for this track:
. If the captions track is not intended to provide such accessibility: Keep the default value, Disabled. When you do, for DASH manifests, MediaConvert instead adds the following in the adaptation set for this track: .
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 ImscAccessibilitySubs
impl ImscAccessibilitySubs
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 ImscAccessibilitySubs
impl AsRef<str> for ImscAccessibilitySubs
source§impl Clone for ImscAccessibilitySubs
impl Clone for ImscAccessibilitySubs
source§fn clone(&self) -> ImscAccessibilitySubs
fn clone(&self) -> ImscAccessibilitySubs
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ImscAccessibilitySubs
impl Debug for ImscAccessibilitySubs
source§impl Display for ImscAccessibilitySubs
impl Display for ImscAccessibilitySubs
source§impl From<&str> for ImscAccessibilitySubs
impl From<&str> for ImscAccessibilitySubs
source§impl FromStr for ImscAccessibilitySubs
impl FromStr for ImscAccessibilitySubs
source§impl Hash for ImscAccessibilitySubs
impl Hash for ImscAccessibilitySubs
source§impl Ord for ImscAccessibilitySubs
impl Ord for ImscAccessibilitySubs
source§fn cmp(&self, other: &ImscAccessibilitySubs) -> Ordering
fn cmp(&self, other: &ImscAccessibilitySubs) -> 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 ImscAccessibilitySubs
impl PartialEq for ImscAccessibilitySubs
source§fn eq(&self, other: &ImscAccessibilitySubs) -> bool
fn eq(&self, other: &ImscAccessibilitySubs) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ImscAccessibilitySubs
impl PartialOrd for ImscAccessibilitySubs
source§fn partial_cmp(&self, other: &ImscAccessibilitySubs) -> Option<Ordering>
fn partial_cmp(&self, other: &ImscAccessibilitySubs) -> 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 ImscAccessibilitySubs
impl StructuralPartialEq for ImscAccessibilitySubs
Auto Trait Implementations§
impl Freeze for ImscAccessibilitySubs
impl RefUnwindSafe for ImscAccessibilitySubs
impl Send for ImscAccessibilitySubs
impl Sync for ImscAccessibilitySubs
impl Unpin for ImscAccessibilitySubs
impl UnwindSafe for ImscAccessibilitySubs
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