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