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