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