#[non_exhaustive]pub enum AssessmentReportDestinationType {
S3,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against AssessmentReportDestinationType, 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 assessmentreportdestinationtype = unimplemented!();
match assessmentreportdestinationtype {
AssessmentReportDestinationType::S3 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when assessmentreportdestinationtype represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant AssessmentReportDestinationType::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
AssessmentReportDestinationType::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 AssessmentReportDestinationType::NewFeature is defined.
Specifically, when assessmentreportdestinationtype represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on AssessmentReportDestinationType::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
S3
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 AssessmentReportDestinationType
impl AssessmentReportDestinationType
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 AssessmentReportDestinationType
impl AsRef<str> for AssessmentReportDestinationType
source§impl Clone for AssessmentReportDestinationType
impl Clone for AssessmentReportDestinationType
source§fn clone(&self) -> AssessmentReportDestinationType
fn clone(&self) -> AssessmentReportDestinationType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl From<&str> for AssessmentReportDestinationType
impl From<&str> for AssessmentReportDestinationType
source§impl Ord for AssessmentReportDestinationType
impl Ord for AssessmentReportDestinationType
source§fn cmp(&self, other: &AssessmentReportDestinationType) -> Ordering
fn cmp(&self, other: &AssessmentReportDestinationType) -> 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 AssessmentReportDestinationType
impl PartialEq for AssessmentReportDestinationType
source§fn eq(&self, other: &AssessmentReportDestinationType) -> bool
fn eq(&self, other: &AssessmentReportDestinationType) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for AssessmentReportDestinationType
impl PartialOrd for AssessmentReportDestinationType
source§fn partial_cmp(
&self,
other: &AssessmentReportDestinationType
) -> Option<Ordering>
fn partial_cmp( &self, other: &AssessmentReportDestinationType ) -> 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 AssessmentReportDestinationType
impl StructuralEq for AssessmentReportDestinationType
impl StructuralPartialEq for AssessmentReportDestinationType
Auto Trait Implementations§
impl RefUnwindSafe for AssessmentReportDestinationType
impl Send for AssessmentReportDestinationType
impl Sync for AssessmentReportDestinationType
impl Unpin for AssessmentReportDestinationType
impl UnwindSafe for AssessmentReportDestinationType
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
§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.