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