Enum bonsaidb::keystorage::s3::aws_sdk_s3::types::OptionalObjectAttributes
#[non_exhaustive]pub enum OptionalObjectAttributes {
RestoreStatus,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against OptionalObjectAttributes
, 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 optionalobjectattributes = unimplemented!();
match optionalobjectattributes {
OptionalObjectAttributes::RestoreStatus => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when optionalobjectattributes
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant OptionalObjectAttributes::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
OptionalObjectAttributes::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 OptionalObjectAttributes::NewFeature
is defined.
Specifically, when optionalobjectattributes
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on OptionalObjectAttributes::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
RestoreStatus
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
§impl AsRef<str> for OptionalObjectAttributes
impl AsRef<str> for OptionalObjectAttributes
§impl Clone for OptionalObjectAttributes
impl Clone for OptionalObjectAttributes
§fn clone(&self) -> OptionalObjectAttributes
fn clone(&self) -> OptionalObjectAttributes
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl Debug for OptionalObjectAttributes
impl Debug for OptionalObjectAttributes
§impl From<&str> for OptionalObjectAttributes
impl From<&str> for OptionalObjectAttributes
§fn from(s: &str) -> OptionalObjectAttributes
fn from(s: &str) -> OptionalObjectAttributes
§impl FromStr for OptionalObjectAttributes
impl FromStr for OptionalObjectAttributes
§type Err = Infallible
type Err = Infallible
§fn from_str(
s: &str
) -> Result<OptionalObjectAttributes, <OptionalObjectAttributes as FromStr>::Err>
fn from_str( s: &str ) -> Result<OptionalObjectAttributes, <OptionalObjectAttributes as FromStr>::Err>
s
to return a value of this type. Read more§impl Hash for OptionalObjectAttributes
impl Hash for OptionalObjectAttributes
§impl Ord for OptionalObjectAttributes
impl Ord for OptionalObjectAttributes
§fn cmp(&self, other: &OptionalObjectAttributes) -> Ordering
fn cmp(&self, other: &OptionalObjectAttributes) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
§impl PartialEq for OptionalObjectAttributes
impl PartialEq for OptionalObjectAttributes
§fn eq(&self, other: &OptionalObjectAttributes) -> bool
fn eq(&self, other: &OptionalObjectAttributes) -> bool
self
and other
values to be equal, and is used
by ==
.§impl PartialOrd for OptionalObjectAttributes
impl PartialOrd for OptionalObjectAttributes
§fn partial_cmp(&self, other: &OptionalObjectAttributes) -> Option<Ordering>
fn partial_cmp(&self, other: &OptionalObjectAttributes) -> 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 OptionalObjectAttributes
impl StructuralEq for OptionalObjectAttributes
impl StructuralPartialEq for OptionalObjectAttributes
Auto Trait Implementations§
impl RefUnwindSafe for OptionalObjectAttributes
impl Send for OptionalObjectAttributes
impl Sync for OptionalObjectAttributes
impl Unpin for OptionalObjectAttributes
impl UnwindSafe for OptionalObjectAttributes
Blanket Implementations§
§impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
§impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
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
§impl<T> CallHasher for T
impl<T> CallHasher for T
§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.