#[non_exhaustive]pub enum ScalingBehavior {
Default,
Fill,
Fit,
FitNoUpscale,
StretchToOutput,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ScalingBehavior
, 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 scalingbehavior = unimplemented!();
match scalingbehavior {
ScalingBehavior::Default => { /* ... */ },
ScalingBehavior::Fill => { /* ... */ },
ScalingBehavior::Fit => { /* ... */ },
ScalingBehavior::FitNoUpscale => { /* ... */ },
ScalingBehavior::StretchToOutput => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when scalingbehavior
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ScalingBehavior::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ScalingBehavior::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 ScalingBehavior::NewFeature
is defined.
Specifically, when scalingbehavior
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ScalingBehavior::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 video Scaling behavior when your output has a different resolution than your input. For more information, see https://docs.aws.amazon.com/mediaconvert/latest/ug/video-scaling.html
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Default
Fill
Fit
FitNoUpscale
StretchToOutput
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 ScalingBehavior
impl ScalingBehavior
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 ScalingBehavior
impl AsRef<str> for ScalingBehavior
source§impl Clone for ScalingBehavior
impl Clone for ScalingBehavior
source§fn clone(&self) -> ScalingBehavior
fn clone(&self) -> ScalingBehavior
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ScalingBehavior
impl Debug for ScalingBehavior
source§impl Display for ScalingBehavior
impl Display for ScalingBehavior
source§impl From<&str> for ScalingBehavior
impl From<&str> for ScalingBehavior
source§impl FromStr for ScalingBehavior
impl FromStr for ScalingBehavior
source§impl Hash for ScalingBehavior
impl Hash for ScalingBehavior
source§impl Ord for ScalingBehavior
impl Ord for ScalingBehavior
source§fn cmp(&self, other: &ScalingBehavior) -> Ordering
fn cmp(&self, other: &ScalingBehavior) -> 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 ScalingBehavior
impl PartialEq for ScalingBehavior
source§fn eq(&self, other: &ScalingBehavior) -> bool
fn eq(&self, other: &ScalingBehavior) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ScalingBehavior
impl PartialOrd for ScalingBehavior
source§fn partial_cmp(&self, other: &ScalingBehavior) -> Option<Ordering>
fn partial_cmp(&self, other: &ScalingBehavior) -> 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 ScalingBehavior
impl StructuralPartialEq for ScalingBehavior
Auto Trait Implementations§
impl Freeze for ScalingBehavior
impl RefUnwindSafe for ScalingBehavior
impl Send for ScalingBehavior
impl Sync for ScalingBehavior
impl Unpin for ScalingBehavior
impl UnwindSafe for ScalingBehavior
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