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