#[non_exhaustive]pub enum MlModelType {
Binary,
Multiclass,
Regression,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MlModelType
, 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 mlmodeltype = unimplemented!();
match mlmodeltype {
MlModelType::Binary => { /* ... */ },
MlModelType::Multiclass => { /* ... */ },
MlModelType::Regression => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when mlmodeltype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MlModelType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MlModelType::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 MlModelType::NewFeature
is defined.
Specifically, when mlmodeltype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MlModelType::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
Binary
Multiclass
Regression
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 MlModelType
impl MlModelType
source§impl MlModelType
impl MlModelType
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 MlModelType
impl AsRef<str> for MlModelType
source§impl Clone for MlModelType
impl Clone for MlModelType
source§fn clone(&self) -> MlModelType
fn clone(&self) -> MlModelType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for MlModelType
impl Debug for MlModelType
source§impl Display for MlModelType
impl Display for MlModelType
source§impl From<&str> for MlModelType
impl From<&str> for MlModelType
source§impl FromStr for MlModelType
impl FromStr for MlModelType
source§impl Hash for MlModelType
impl Hash for MlModelType
source§impl Ord for MlModelType
impl Ord for MlModelType
source§fn cmp(&self, other: &MlModelType) -> Ordering
fn cmp(&self, other: &MlModelType) -> 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 MlModelType
impl PartialEq for MlModelType
source§fn eq(&self, other: &MlModelType) -> bool
fn eq(&self, other: &MlModelType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for MlModelType
impl PartialOrd for MlModelType
source§fn partial_cmp(&self, other: &MlModelType) -> Option<Ordering>
fn partial_cmp(&self, other: &MlModelType) -> 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 MlModelType
impl StructuralPartialEq for MlModelType
Auto Trait Implementations§
impl Freeze for MlModelType
impl RefUnwindSafe for MlModelType
impl Send for MlModelType
impl Sync for MlModelType
impl Unpin for MlModelType
impl UnwindSafe for MlModelType
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
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more