Enum aws_sdk_chime::types::UserType
source · #[non_exhaustive]pub enum UserType {
PrivateUser,
SharedDevice,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against UserType
, 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 usertype = unimplemented!();
match usertype {
UserType::PrivateUser => { /* ... */ },
UserType::SharedDevice => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when usertype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant UserType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
UserType::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 UserType::NewFeature
is defined.
Specifically, when usertype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on UserType::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
PrivateUser
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl Ord for UserType
impl Ord for UserType
source§impl PartialEq for UserType
impl PartialEq for UserType
source§impl PartialOrd for UserType
impl PartialOrd for UserType
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 UserType
impl StructuralPartialEq for UserType
Auto Trait Implementations§
impl Freeze for UserType
impl RefUnwindSafe for UserType
impl Send for UserType
impl Sync for UserType
impl Unpin for UserType
impl UnwindSafe for UserType
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> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.