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