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