Enum aws_sdk_connect::types::InstanceStatus
source · #[non_exhaustive]pub enum InstanceStatus {
Active,
CreationFailed,
CreationInProgress,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against InstanceStatus
, 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 instancestatus = unimplemented!();
match instancestatus {
InstanceStatus::Active => { /* ... */ },
InstanceStatus::CreationFailed => { /* ... */ },
InstanceStatus::CreationInProgress => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when instancestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant InstanceStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
InstanceStatus::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 InstanceStatus::NewFeature
is defined.
Specifically, when instancestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on InstanceStatus::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
Active
CreationFailed
CreationInProgress
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§
source§impl InstanceStatus
impl InstanceStatus
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for InstanceStatus
impl AsRef<str> for InstanceStatus
source§impl Clone for InstanceStatus
impl Clone for InstanceStatus
source§fn clone(&self) -> InstanceStatus
fn clone(&self) -> InstanceStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for InstanceStatus
impl Debug for InstanceStatus
source§impl From<&str> for InstanceStatus
impl From<&str> for InstanceStatus
source§impl FromStr for InstanceStatus
impl FromStr for InstanceStatus
source§impl Hash for InstanceStatus
impl Hash for InstanceStatus
source§impl Ord for InstanceStatus
impl Ord for InstanceStatus
source§fn cmp(&self, other: &InstanceStatus) -> Ordering
fn cmp(&self, other: &InstanceStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq for InstanceStatus
impl PartialEq for InstanceStatus
source§fn eq(&self, other: &InstanceStatus) -> bool
fn eq(&self, other: &InstanceStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for InstanceStatus
impl PartialOrd for InstanceStatus
source§fn partial_cmp(&self, other: &InstanceStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &InstanceStatus) -> 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 InstanceStatus
impl StructuralEq for InstanceStatus
impl StructuralPartialEq for InstanceStatus
Auto Trait Implementations§
impl RefUnwindSafe for InstanceStatus
impl Send for InstanceStatus
impl Sync for InstanceStatus
impl Unpin for InstanceStatus
impl UnwindSafe for InstanceStatus
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
§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,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§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,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.