#[non_exhaustive]pub enum SearchResourcesSimpleCriterionKey {
AccountId,
S3BucketEffectivePermission,
S3BucketName,
S3BucketSharedAccess,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against SearchResourcesSimpleCriterionKey
, 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 searchresourcessimplecriterionkey = unimplemented!();
match searchresourcessimplecriterionkey {
SearchResourcesSimpleCriterionKey::AccountId => { /* ... */ },
SearchResourcesSimpleCriterionKey::S3BucketEffectivePermission => { /* ... */ },
SearchResourcesSimpleCriterionKey::S3BucketName => { /* ... */ },
SearchResourcesSimpleCriterionKey::S3BucketSharedAccess => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when searchresourcessimplecriterionkey
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant SearchResourcesSimpleCriterionKey::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
SearchResourcesSimpleCriterionKey::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 SearchResourcesSimpleCriterionKey::NewFeature
is defined.
Specifically, when searchresourcessimplecriterionkey
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on SearchResourcesSimpleCriterionKey::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.
The property to use in a condition that filters the query results. Valid values are:
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
AccountId
S3BucketEffectivePermission
S3BucketName
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for SearchResourcesSimpleCriterionKey
impl AsRef<str> for SearchResourcesSimpleCriterionKey
source§impl Clone for SearchResourcesSimpleCriterionKey
impl Clone for SearchResourcesSimpleCriterionKey
source§fn clone(&self) -> SearchResourcesSimpleCriterionKey
fn clone(&self) -> SearchResourcesSimpleCriterionKey
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 SearchResourcesSimpleCriterionKey
impl From<&str> for SearchResourcesSimpleCriterionKey
source§impl Ord for SearchResourcesSimpleCriterionKey
impl Ord for SearchResourcesSimpleCriterionKey
source§fn cmp(&self, other: &SearchResourcesSimpleCriterionKey) -> Ordering
fn cmp(&self, other: &SearchResourcesSimpleCriterionKey) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<SearchResourcesSimpleCriterionKey> for SearchResourcesSimpleCriterionKey
impl PartialEq<SearchResourcesSimpleCriterionKey> for SearchResourcesSimpleCriterionKey
source§fn eq(&self, other: &SearchResourcesSimpleCriterionKey) -> bool
fn eq(&self, other: &SearchResourcesSimpleCriterionKey) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<SearchResourcesSimpleCriterionKey> for SearchResourcesSimpleCriterionKey
impl PartialOrd<SearchResourcesSimpleCriterionKey> for SearchResourcesSimpleCriterionKey
source§fn partial_cmp(
&self,
other: &SearchResourcesSimpleCriterionKey
) -> Option<Ordering>
fn partial_cmp( &self, other: &SearchResourcesSimpleCriterionKey ) -> 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 SearchResourcesSimpleCriterionKey
impl StructuralEq for SearchResourcesSimpleCriterionKey
impl StructuralPartialEq for SearchResourcesSimpleCriterionKey
Auto Trait Implementations§
impl RefUnwindSafe for SearchResourcesSimpleCriterionKey
impl Send for SearchResourcesSimpleCriterionKey
impl Sync for SearchResourcesSimpleCriterionKey
impl Unpin for SearchResourcesSimpleCriterionKey
impl UnwindSafe for SearchResourcesSimpleCriterionKey
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> 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,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.