Enum aws_sdk_ivs::types::StreamHealth
source · #[non_exhaustive]pub enum StreamHealth {
StreamHealthy,
Starving,
UnknownValue,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against StreamHealth
, 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 streamhealth = unimplemented!();
match streamhealth {
StreamHealth::StreamHealthy => { /* ... */ },
StreamHealth::Starving => { /* ... */ },
StreamHealth::UnknownValue => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when streamhealth
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant StreamHealth::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
StreamHealth::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 StreamHealth::NewFeature
is defined.
Specifically, when streamhealth
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on StreamHealth::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.
Note:
StreamHealth::Unknown
has been renamed to::UnknownValue
.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
StreamHealthy
Starving
UnknownValue
Note: ::Unknown
has been renamed to ::UnknownValue
.
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 StreamHealth
impl StreamHealth
source§impl StreamHealth
impl StreamHealth
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 StreamHealth
impl AsRef<str> for StreamHealth
source§impl Clone for StreamHealth
impl Clone for StreamHealth
source§fn clone(&self) -> StreamHealth
fn clone(&self) -> StreamHealth
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for StreamHealth
impl Debug for StreamHealth
source§impl Display for StreamHealth
impl Display for StreamHealth
source§impl From<&str> for StreamHealth
impl From<&str> for StreamHealth
source§impl FromStr for StreamHealth
impl FromStr for StreamHealth
source§impl Hash for StreamHealth
impl Hash for StreamHealth
source§impl Ord for StreamHealth
impl Ord for StreamHealth
source§fn cmp(&self, other: &StreamHealth) -> Ordering
fn cmp(&self, other: &StreamHealth) -> 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 StreamHealth
impl PartialEq for StreamHealth
source§fn eq(&self, other: &StreamHealth) -> bool
fn eq(&self, other: &StreamHealth) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for StreamHealth
impl PartialOrd for StreamHealth
source§fn partial_cmp(&self, other: &StreamHealth) -> Option<Ordering>
fn partial_cmp(&self, other: &StreamHealth) -> 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 StreamHealth
impl StructuralPartialEq for StreamHealth
Auto Trait Implementations§
impl Freeze for StreamHealth
impl RefUnwindSafe for StreamHealth
impl Send for StreamHealth
impl Sync for StreamHealth
impl Unpin for StreamHealth
impl UnwindSafe for StreamHealth
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> 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