#[non_exhaustive]pub enum DvbSubtitleBackgroundColor {
Auto,
Black,
None,
White,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DvbSubtitleBackgroundColor
, 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 dvbsubtitlebackgroundcolor = unimplemented!();
match dvbsubtitlebackgroundcolor {
DvbSubtitleBackgroundColor::Auto => { /* ... */ },
DvbSubtitleBackgroundColor::Black => { /* ... */ },
DvbSubtitleBackgroundColor::None => { /* ... */ },
DvbSubtitleBackgroundColor::White => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when dvbsubtitlebackgroundcolor
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DvbSubtitleBackgroundColor::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DvbSubtitleBackgroundColor::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 DvbSubtitleBackgroundColor::NewFeature
is defined.
Specifically, when dvbsubtitlebackgroundcolor
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DvbSubtitleBackgroundColor::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 color of the rectangle behind the captions. Leave background color blank and set Style passthrough to enabled to use the background color data from your input captions, if present.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Auto
Black
None
White
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 DvbSubtitleBackgroundColor
impl DvbSubtitleBackgroundColor
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 DvbSubtitleBackgroundColor
impl AsRef<str> for DvbSubtitleBackgroundColor
source§impl Clone for DvbSubtitleBackgroundColor
impl Clone for DvbSubtitleBackgroundColor
source§fn clone(&self) -> DvbSubtitleBackgroundColor
fn clone(&self) -> DvbSubtitleBackgroundColor
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DvbSubtitleBackgroundColor
impl Debug for DvbSubtitleBackgroundColor
source§impl Display for DvbSubtitleBackgroundColor
impl Display for DvbSubtitleBackgroundColor
source§impl From<&str> for DvbSubtitleBackgroundColor
impl From<&str> for DvbSubtitleBackgroundColor
source§impl FromStr for DvbSubtitleBackgroundColor
impl FromStr for DvbSubtitleBackgroundColor
source§impl Hash for DvbSubtitleBackgroundColor
impl Hash for DvbSubtitleBackgroundColor
source§impl Ord for DvbSubtitleBackgroundColor
impl Ord for DvbSubtitleBackgroundColor
source§fn cmp(&self, other: &DvbSubtitleBackgroundColor) -> Ordering
fn cmp(&self, other: &DvbSubtitleBackgroundColor) -> 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 DvbSubtitleBackgroundColor
impl PartialEq for DvbSubtitleBackgroundColor
source§fn eq(&self, other: &DvbSubtitleBackgroundColor) -> bool
fn eq(&self, other: &DvbSubtitleBackgroundColor) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DvbSubtitleBackgroundColor
impl PartialOrd for DvbSubtitleBackgroundColor
source§fn partial_cmp(&self, other: &DvbSubtitleBackgroundColor) -> Option<Ordering>
fn partial_cmp(&self, other: &DvbSubtitleBackgroundColor) -> 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 DvbSubtitleBackgroundColor
impl StructuralPartialEq for DvbSubtitleBackgroundColor
Auto Trait Implementations§
impl Freeze for DvbSubtitleBackgroundColor
impl RefUnwindSafe for DvbSubtitleBackgroundColor
impl Send for DvbSubtitleBackgroundColor
impl Sync for DvbSubtitleBackgroundColor
impl Unpin for DvbSubtitleBackgroundColor
impl UnwindSafe for DvbSubtitleBackgroundColor
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