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