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