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