#[non_exhaustive]pub enum CmfcTimedMetadata {
None,
Passthrough,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against CmfcTimedMetadata
, 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 cmfctimedmetadata = unimplemented!();
match cmfctimedmetadata {
CmfcTimedMetadata::None => { /* ... */ },
CmfcTimedMetadata::Passthrough => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when cmfctimedmetadata
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant CmfcTimedMetadata::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
CmfcTimedMetadata::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 CmfcTimedMetadata::NewFeature
is defined.
Specifically, when cmfctimedmetadata
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on CmfcTimedMetadata::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. To include ID3 metadata in this output: Set ID3 metadata to Passthrough. Specify this ID3 metadata in Custom ID3 metadata inserter. MediaConvert writes each instance of ID3 metadata in a separate Event Message (eMSG) box. To exclude this ID3 metadata: Set ID3 metadata to None or leave blank.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
None
Passthrough
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 CmfcTimedMetadata
impl CmfcTimedMetadata
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 CmfcTimedMetadata
impl AsRef<str> for CmfcTimedMetadata
source§impl Clone for CmfcTimedMetadata
impl Clone for CmfcTimedMetadata
source§fn clone(&self) -> CmfcTimedMetadata
fn clone(&self) -> CmfcTimedMetadata
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for CmfcTimedMetadata
impl Debug for CmfcTimedMetadata
source§impl Display for CmfcTimedMetadata
impl Display for CmfcTimedMetadata
source§impl From<&str> for CmfcTimedMetadata
impl From<&str> for CmfcTimedMetadata
source§impl FromStr for CmfcTimedMetadata
impl FromStr for CmfcTimedMetadata
source§impl Hash for CmfcTimedMetadata
impl Hash for CmfcTimedMetadata
source§impl Ord for CmfcTimedMetadata
impl Ord for CmfcTimedMetadata
source§fn cmp(&self, other: &CmfcTimedMetadata) -> Ordering
fn cmp(&self, other: &CmfcTimedMetadata) -> 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 CmfcTimedMetadata
impl PartialEq for CmfcTimedMetadata
source§fn eq(&self, other: &CmfcTimedMetadata) -> bool
fn eq(&self, other: &CmfcTimedMetadata) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for CmfcTimedMetadata
impl PartialOrd for CmfcTimedMetadata
source§fn partial_cmp(&self, other: &CmfcTimedMetadata) -> Option<Ordering>
fn partial_cmp(&self, other: &CmfcTimedMetadata) -> 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 CmfcTimedMetadata
impl StructuralPartialEq for CmfcTimedMetadata
Auto Trait Implementations§
impl Freeze for CmfcTimedMetadata
impl RefUnwindSafe for CmfcTimedMetadata
impl Send for CmfcTimedMetadata
impl Sync for CmfcTimedMetadata
impl Unpin for CmfcTimedMetadata
impl UnwindSafe for CmfcTimedMetadata
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