#[non_exhaustive]pub enum AudioTypeControl {
FollowInput,
UseConfigured,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against AudioTypeControl
, 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 audiotypecontrol = unimplemented!();
match audiotypecontrol {
AudioTypeControl::FollowInput => { /* ... */ },
AudioTypeControl::UseConfigured => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when audiotypecontrol
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant AudioTypeControl::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
AudioTypeControl::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 AudioTypeControl::NewFeature
is defined.
Specifically, when audiotypecontrol
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on AudioTypeControl::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. When set to FOLLOW_INPUT, if the input contains an ISO 639 audio_type, then that value is passed through to the output. If the input contains no ISO 639 audio_type, the value in Audio Type is included in the output. Otherwise the value in Audio Type is included in the output. Note that this field and audioType are both ignored if audioDescriptionBroadcasterMix is set to BROADCASTER_MIXED_AD.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
FollowInput
UseConfigured
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 AudioTypeControl
impl AudioTypeControl
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 AudioTypeControl
impl AsRef<str> for AudioTypeControl
source§impl Clone for AudioTypeControl
impl Clone for AudioTypeControl
source§fn clone(&self) -> AudioTypeControl
fn clone(&self) -> AudioTypeControl
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for AudioTypeControl
impl Debug for AudioTypeControl
source§impl Display for AudioTypeControl
impl Display for AudioTypeControl
source§impl From<&str> for AudioTypeControl
impl From<&str> for AudioTypeControl
source§impl FromStr for AudioTypeControl
impl FromStr for AudioTypeControl
source§impl Hash for AudioTypeControl
impl Hash for AudioTypeControl
source§impl Ord for AudioTypeControl
impl Ord for AudioTypeControl
source§fn cmp(&self, other: &AudioTypeControl) -> Ordering
fn cmp(&self, other: &AudioTypeControl) -> 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 AudioTypeControl
impl PartialEq for AudioTypeControl
source§fn eq(&self, other: &AudioTypeControl) -> bool
fn eq(&self, other: &AudioTypeControl) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for AudioTypeControl
impl PartialOrd for AudioTypeControl
source§fn partial_cmp(&self, other: &AudioTypeControl) -> Option<Ordering>
fn partial_cmp(&self, other: &AudioTypeControl) -> 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 AudioTypeControl
impl StructuralPartialEq for AudioTypeControl
Auto Trait Implementations§
impl Freeze for AudioTypeControl
impl RefUnwindSafe for AudioTypeControl
impl Send for AudioTypeControl
impl Sync for AudioTypeControl
impl Unpin for AudioTypeControl
impl UnwindSafe for AudioTypeControl
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