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