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