#[non_exhaustive]pub enum XavcInterlaceMode {
BottomField,
FollowBottomField,
FollowTopField,
Progressive,
TopField,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against XavcInterlaceMode
, 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 xavcinterlacemode = unimplemented!();
match xavcinterlacemode {
XavcInterlaceMode::BottomField => { /* ... */ },
XavcInterlaceMode::FollowBottomField => { /* ... */ },
XavcInterlaceMode::FollowTopField => { /* ... */ },
XavcInterlaceMode::Progressive => { /* ... */ },
XavcInterlaceMode::TopField => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when xavcinterlacemode
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant XavcInterlaceMode::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
XavcInterlaceMode::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 XavcInterlaceMode::NewFeature
is defined.
Specifically, when xavcinterlacemode
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on XavcInterlaceMode::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. Choose the scan line type for the output. Keep the default value, Progressive to create a progressive output, regardless of the scan type of your input. Use Top field first or Bottom field first to create an output that’s interlaced with the same field polarity throughout. Use Follow, default top or Follow, default bottom to produce outputs with the same field polarity as the source. For jobs that have multiple inputs, the output field polarity might change over the course of the output. Follow behavior depends on the input scan type. If the source is interlaced, the output will be interlaced with the same polarity as the source. If the source is progressive, the output will be interlaced with top field bottom field first, depending on which of the Follow options you choose.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
BottomField
FollowBottomField
FollowTopField
Progressive
TopField
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 XavcInterlaceMode
impl XavcInterlaceMode
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 XavcInterlaceMode
impl AsRef<str> for XavcInterlaceMode
source§impl Clone for XavcInterlaceMode
impl Clone for XavcInterlaceMode
source§fn clone(&self) -> XavcInterlaceMode
fn clone(&self) -> XavcInterlaceMode
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for XavcInterlaceMode
impl Debug for XavcInterlaceMode
source§impl Display for XavcInterlaceMode
impl Display for XavcInterlaceMode
source§impl From<&str> for XavcInterlaceMode
impl From<&str> for XavcInterlaceMode
source§impl FromStr for XavcInterlaceMode
impl FromStr for XavcInterlaceMode
source§impl Hash for XavcInterlaceMode
impl Hash for XavcInterlaceMode
source§impl Ord for XavcInterlaceMode
impl Ord for XavcInterlaceMode
source§fn cmp(&self, other: &XavcInterlaceMode) -> Ordering
fn cmp(&self, other: &XavcInterlaceMode) -> 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 XavcInterlaceMode
impl PartialEq for XavcInterlaceMode
source§fn eq(&self, other: &XavcInterlaceMode) -> bool
fn eq(&self, other: &XavcInterlaceMode) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for XavcInterlaceMode
impl PartialOrd for XavcInterlaceMode
source§fn partial_cmp(&self, other: &XavcInterlaceMode) -> Option<Ordering>
fn partial_cmp(&self, other: &XavcInterlaceMode) -> 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 XavcInterlaceMode
impl StructuralPartialEq for XavcInterlaceMode
Auto Trait Implementations§
impl Freeze for XavcInterlaceMode
impl RefUnwindSafe for XavcInterlaceMode
impl Send for XavcInterlaceMode
impl Sync for XavcInterlaceMode
impl Unpin for XavcInterlaceMode
impl UnwindSafe for XavcInterlaceMode
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