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