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