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