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