#[non_exhaustive]pub enum Eac3AtmosDownmixControl {
InitializeFromSource,
Specified,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Eac3AtmosDownmixControl
, 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 eac3atmosdownmixcontrol = unimplemented!();
match eac3atmosdownmixcontrol {
Eac3AtmosDownmixControl::InitializeFromSource => { /* ... */ },
Eac3AtmosDownmixControl::Specified => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when eac3atmosdownmixcontrol
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Eac3AtmosDownmixControl::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Eac3AtmosDownmixControl::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 Eac3AtmosDownmixControl::NewFeature
is defined.
Specifically, when eac3atmosdownmixcontrol
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Eac3AtmosDownmixControl::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. Specify whether MediaConvert should use any downmix metadata from your input file. Keep the default value, Custom to provide downmix values in your job settings. Choose Follow source to use the metadata from your input. Related settings–Use these settings to specify your downmix values: Left only/Right only surround, Left total/Right total surround, Left total/Right total center, Left only/Right only center, and Stereo downmix. When you keep Custom for Downmix control and you don’t specify values for the related settings, MediaConvert uses default values for those settings.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
InitializeFromSource
Specified
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 Eac3AtmosDownmixControl
impl Eac3AtmosDownmixControl
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 Eac3AtmosDownmixControl
impl AsRef<str> for Eac3AtmosDownmixControl
source§impl Clone for Eac3AtmosDownmixControl
impl Clone for Eac3AtmosDownmixControl
source§fn clone(&self) -> Eac3AtmosDownmixControl
fn clone(&self) -> Eac3AtmosDownmixControl
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for Eac3AtmosDownmixControl
impl Debug for Eac3AtmosDownmixControl
source§impl Display for Eac3AtmosDownmixControl
impl Display for Eac3AtmosDownmixControl
source§impl From<&str> for Eac3AtmosDownmixControl
impl From<&str> for Eac3AtmosDownmixControl
source§impl FromStr for Eac3AtmosDownmixControl
impl FromStr for Eac3AtmosDownmixControl
source§impl Hash for Eac3AtmosDownmixControl
impl Hash for Eac3AtmosDownmixControl
source§impl Ord for Eac3AtmosDownmixControl
impl Ord for Eac3AtmosDownmixControl
source§fn cmp(&self, other: &Eac3AtmosDownmixControl) -> Ordering
fn cmp(&self, other: &Eac3AtmosDownmixControl) -> 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 Eac3AtmosDownmixControl
impl PartialEq for Eac3AtmosDownmixControl
source§fn eq(&self, other: &Eac3AtmosDownmixControl) -> bool
fn eq(&self, other: &Eac3AtmosDownmixControl) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for Eac3AtmosDownmixControl
impl PartialOrd for Eac3AtmosDownmixControl
source§fn partial_cmp(&self, other: &Eac3AtmosDownmixControl) -> Option<Ordering>
fn partial_cmp(&self, other: &Eac3AtmosDownmixControl) -> 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 Eac3AtmosDownmixControl
impl StructuralPartialEq for Eac3AtmosDownmixControl
Auto Trait Implementations§
impl Freeze for Eac3AtmosDownmixControl
impl RefUnwindSafe for Eac3AtmosDownmixControl
impl Send for Eac3AtmosDownmixControl
impl Sync for Eac3AtmosDownmixControl
impl Unpin for Eac3AtmosDownmixControl
impl UnwindSafe for Eac3AtmosDownmixControl
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