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