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