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