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