Enum aws_sdk_s3::types::PartitionDateSource
source · #[non_exhaustive]pub enum PartitionDateSource {
DeliveryTime,
EventTime,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against PartitionDateSource
, 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 partitiondatesource = unimplemented!();
match partitiondatesource {
PartitionDateSource::DeliveryTime => { /* ... */ },
PartitionDateSource::EventTime => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when partitiondatesource
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant PartitionDateSource::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
PartitionDateSource::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 PartitionDateSource::NewFeature
is defined.
Specifically, when partitiondatesource
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on PartitionDateSource::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
DeliveryTime
EventTime
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 PartitionDateSource
impl PartitionDateSource
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 PartitionDateSource
impl AsRef<str> for PartitionDateSource
source§impl Clone for PartitionDateSource
impl Clone for PartitionDateSource
source§fn clone(&self) -> PartitionDateSource
fn clone(&self) -> PartitionDateSource
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for PartitionDateSource
impl Debug for PartitionDateSource
source§impl Display for PartitionDateSource
impl Display for PartitionDateSource
source§impl From<&str> for PartitionDateSource
impl From<&str> for PartitionDateSource
source§impl FromStr for PartitionDateSource
impl FromStr for PartitionDateSource
source§impl Hash for PartitionDateSource
impl Hash for PartitionDateSource
source§impl Ord for PartitionDateSource
impl Ord for PartitionDateSource
source§fn cmp(&self, other: &PartitionDateSource) -> Ordering
fn cmp(&self, other: &PartitionDateSource) -> 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 PartitionDateSource
impl PartialEq for PartitionDateSource
source§impl PartialOrd for PartitionDateSource
impl PartialOrd for PartitionDateSource
impl Eq for PartitionDateSource
impl StructuralPartialEq for PartitionDateSource
Auto Trait Implementations§
impl Freeze for PartitionDateSource
impl RefUnwindSafe for PartitionDateSource
impl Send for PartitionDateSource
impl Sync for PartitionDateSource
impl Unpin for PartitionDateSource
impl UnwindSafe for PartitionDateSource
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<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)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.