#[non_exhaustive]pub enum HubContentSupportStatus {
Deprecated,
Supported,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against HubContentSupportStatus, 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 hubcontentsupportstatus = unimplemented!();
match hubcontentsupportstatus {
HubContentSupportStatus::Deprecated => { /* ... */ },
HubContentSupportStatus::Supported => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when hubcontentsupportstatus represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HubContentSupportStatus::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
HubContentSupportStatus::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 HubContentSupportStatus::NewFeature is defined.
Specifically, when hubcontentsupportstatus represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on HubContentSupportStatus::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis 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
Deprecated
Supported
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 HubContentSupportStatus
impl HubContentSupportStatus
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 HubContentSupportStatus
impl AsRef<str> for HubContentSupportStatus
source§impl Clone for HubContentSupportStatus
impl Clone for HubContentSupportStatus
source§fn clone(&self) -> HubContentSupportStatus
fn clone(&self) -> HubContentSupportStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for HubContentSupportStatus
impl Debug for HubContentSupportStatus
source§impl Display for HubContentSupportStatus
impl Display for HubContentSupportStatus
source§impl From<&str> for HubContentSupportStatus
impl From<&str> for HubContentSupportStatus
source§impl FromStr for HubContentSupportStatus
impl FromStr for HubContentSupportStatus
source§impl Hash for HubContentSupportStatus
impl Hash for HubContentSupportStatus
source§impl Ord for HubContentSupportStatus
impl Ord for HubContentSupportStatus
source§fn cmp(&self, other: &HubContentSupportStatus) -> Ordering
fn cmp(&self, other: &HubContentSupportStatus) -> 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 HubContentSupportStatus
impl PartialEq for HubContentSupportStatus
source§impl PartialOrd for HubContentSupportStatus
impl PartialOrd for HubContentSupportStatus
impl Eq for HubContentSupportStatus
impl StructuralPartialEq for HubContentSupportStatus
Auto Trait Implementations§
impl Freeze for HubContentSupportStatus
impl RefUnwindSafe for HubContentSupportStatus
impl Send for HubContentSupportStatus
impl Sync for HubContentSupportStatus
impl Unpin for HubContentSupportStatus
impl UnwindSafe for HubContentSupportStatus
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<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit)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.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more