#[non_exhaustive]
pub enum DataSetFilterAttribute {
DatasetName,
DirectQuicksightOwner,
DirectQuicksightSoleOwner,
DirectQuicksightViewerOrOwner,
QuicksightOwner,
QuicksightViewerOrOwner,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DataSetFilterAttribute
, 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 datasetfilterattribute = unimplemented!();
match datasetfilterattribute {
DataSetFilterAttribute::DatasetName => { /* ... */ },
DataSetFilterAttribute::DirectQuicksightOwner => { /* ... */ },
DataSetFilterAttribute::DirectQuicksightSoleOwner => { /* ... */ },
DataSetFilterAttribute::DirectQuicksightViewerOrOwner => { /* ... */ },
DataSetFilterAttribute::QuicksightOwner => { /* ... */ },
DataSetFilterAttribute::QuicksightViewerOrOwner => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when datasetfilterattribute
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DataSetFilterAttribute::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DataSetFilterAttribute::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 DataSetFilterAttribute::NewFeature
is defined.
Specifically, when datasetfilterattribute
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DataSetFilterAttribute::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
DatasetName
DirectQuicksightOwner
DirectQuicksightSoleOwner
DirectQuicksightViewerOrOwner
QuicksightOwner
QuicksightViewerOrOwner
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for DataSetFilterAttribute
impl AsRef<str> for DataSetFilterAttribute
source§impl Clone for DataSetFilterAttribute
impl Clone for DataSetFilterAttribute
source§fn clone(&self) -> DataSetFilterAttribute
fn clone(&self) -> DataSetFilterAttribute
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DataSetFilterAttribute
impl Debug for DataSetFilterAttribute
source§impl From<&str> for DataSetFilterAttribute
impl From<&str> for DataSetFilterAttribute
source§impl FromStr for DataSetFilterAttribute
impl FromStr for DataSetFilterAttribute
source§impl Hash for DataSetFilterAttribute
impl Hash for DataSetFilterAttribute
source§impl Ord for DataSetFilterAttribute
impl Ord for DataSetFilterAttribute
source§fn cmp(&self, other: &DataSetFilterAttribute) -> Ordering
fn cmp(&self, other: &DataSetFilterAttribute) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<DataSetFilterAttribute> for DataSetFilterAttribute
impl PartialEq<DataSetFilterAttribute> for DataSetFilterAttribute
source§fn eq(&self, other: &DataSetFilterAttribute) -> bool
fn eq(&self, other: &DataSetFilterAttribute) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<DataSetFilterAttribute> for DataSetFilterAttribute
impl PartialOrd<DataSetFilterAttribute> for DataSetFilterAttribute
source§fn partial_cmp(&self, other: &DataSetFilterAttribute) -> Option<Ordering>
fn partial_cmp(&self, other: &DataSetFilterAttribute) -> 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 DataSetFilterAttribute
impl StructuralEq for DataSetFilterAttribute
impl StructuralPartialEq for DataSetFilterAttribute
Auto Trait Implementations§
impl RefUnwindSafe for DataSetFilterAttribute
impl Send for DataSetFilterAttribute
impl Sync for DataSetFilterAttribute
impl Unpin for DataSetFilterAttribute
impl UnwindSafe for DataSetFilterAttribute
Blanket Implementations§
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.