#[non_exhaustive]pub enum Eac3AtmosBitstreamMode {
CompleteMain,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Eac3AtmosBitstreamMode
, 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 eac3atmosbitstreammode = unimplemented!();
match eac3atmosbitstreammode {
Eac3AtmosBitstreamMode::CompleteMain => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when eac3atmosbitstreammode
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Eac3AtmosBitstreamMode::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Eac3AtmosBitstreamMode::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 Eac3AtmosBitstreamMode::NewFeature
is defined.
Specifically, when eac3atmosbitstreammode
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Eac3AtmosBitstreamMode::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 the bitstream mode for the E-AC-3 stream that the encoder emits. For more information about the EAC3 bitstream mode, see ATSC A/52-2012 (Annex E).
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
CompleteMain
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 Eac3AtmosBitstreamMode
impl Eac3AtmosBitstreamMode
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 Eac3AtmosBitstreamMode
impl AsRef<str> for Eac3AtmosBitstreamMode
source§impl Clone for Eac3AtmosBitstreamMode
impl Clone for Eac3AtmosBitstreamMode
source§fn clone(&self) -> Eac3AtmosBitstreamMode
fn clone(&self) -> Eac3AtmosBitstreamMode
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for Eac3AtmosBitstreamMode
impl Debug for Eac3AtmosBitstreamMode
source§impl Display for Eac3AtmosBitstreamMode
impl Display for Eac3AtmosBitstreamMode
source§impl From<&str> for Eac3AtmosBitstreamMode
impl From<&str> for Eac3AtmosBitstreamMode
source§impl FromStr for Eac3AtmosBitstreamMode
impl FromStr for Eac3AtmosBitstreamMode
source§impl Hash for Eac3AtmosBitstreamMode
impl Hash for Eac3AtmosBitstreamMode
source§impl Ord for Eac3AtmosBitstreamMode
impl Ord for Eac3AtmosBitstreamMode
source§fn cmp(&self, other: &Eac3AtmosBitstreamMode) -> Ordering
fn cmp(&self, other: &Eac3AtmosBitstreamMode) -> 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 Eac3AtmosBitstreamMode
impl PartialEq for Eac3AtmosBitstreamMode
source§fn eq(&self, other: &Eac3AtmosBitstreamMode) -> bool
fn eq(&self, other: &Eac3AtmosBitstreamMode) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for Eac3AtmosBitstreamMode
impl PartialOrd for Eac3AtmosBitstreamMode
source§fn partial_cmp(&self, other: &Eac3AtmosBitstreamMode) -> Option<Ordering>
fn partial_cmp(&self, other: &Eac3AtmosBitstreamMode) -> 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 Eac3AtmosBitstreamMode
impl StructuralPartialEq for Eac3AtmosBitstreamMode
Auto Trait Implementations§
impl Freeze for Eac3AtmosBitstreamMode
impl RefUnwindSafe for Eac3AtmosBitstreamMode
impl Send for Eac3AtmosBitstreamMode
impl Sync for Eac3AtmosBitstreamMode
impl Unpin for Eac3AtmosBitstreamMode
impl UnwindSafe for Eac3AtmosBitstreamMode
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