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