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