#[non_exhaustive]pub enum VpcConnectionResourceStatus {
CreationFailed,
CreationInProgress,
CreationSuccessful,
Deleted,
DeletionFailed,
DeletionInProgress,
UpdateFailed,
UpdateInProgress,
UpdateSuccessful,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against VpcConnectionResourceStatus
, 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 vpcconnectionresourcestatus = unimplemented!();
match vpcconnectionresourcestatus {
VpcConnectionResourceStatus::CreationFailed => { /* ... */ },
VpcConnectionResourceStatus::CreationInProgress => { /* ... */ },
VpcConnectionResourceStatus::CreationSuccessful => { /* ... */ },
VpcConnectionResourceStatus::Deleted => { /* ... */ },
VpcConnectionResourceStatus::DeletionFailed => { /* ... */ },
VpcConnectionResourceStatus::DeletionInProgress => { /* ... */ },
VpcConnectionResourceStatus::UpdateFailed => { /* ... */ },
VpcConnectionResourceStatus::UpdateInProgress => { /* ... */ },
VpcConnectionResourceStatus::UpdateSuccessful => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when vpcconnectionresourcestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant VpcConnectionResourceStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
VpcConnectionResourceStatus::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 VpcConnectionResourceStatus::NewFeature
is defined.
Specifically, when vpcconnectionresourcestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on VpcConnectionResourceStatus::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
CreationFailed
CreationInProgress
CreationSuccessful
Deleted
DeletionFailed
DeletionInProgress
UpdateFailed
UpdateInProgress
UpdateSuccessful
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 VpcConnectionResourceStatus
impl VpcConnectionResourceStatus
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 VpcConnectionResourceStatus
impl AsRef<str> for VpcConnectionResourceStatus
source§impl Clone for VpcConnectionResourceStatus
impl Clone for VpcConnectionResourceStatus
source§fn clone(&self) -> VpcConnectionResourceStatus
fn clone(&self) -> VpcConnectionResourceStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for VpcConnectionResourceStatus
impl Debug for VpcConnectionResourceStatus
source§impl From<&str> for VpcConnectionResourceStatus
impl From<&str> for VpcConnectionResourceStatus
source§impl Hash for VpcConnectionResourceStatus
impl Hash for VpcConnectionResourceStatus
source§impl Ord for VpcConnectionResourceStatus
impl Ord for VpcConnectionResourceStatus
source§fn cmp(&self, other: &VpcConnectionResourceStatus) -> Ordering
fn cmp(&self, other: &VpcConnectionResourceStatus) -> 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 VpcConnectionResourceStatus
impl PartialEq for VpcConnectionResourceStatus
source§fn eq(&self, other: &VpcConnectionResourceStatus) -> bool
fn eq(&self, other: &VpcConnectionResourceStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for VpcConnectionResourceStatus
impl PartialOrd for VpcConnectionResourceStatus
source§fn partial_cmp(&self, other: &VpcConnectionResourceStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &VpcConnectionResourceStatus) -> 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 VpcConnectionResourceStatus
impl StructuralEq for VpcConnectionResourceStatus
impl StructuralPartialEq for VpcConnectionResourceStatus
Auto Trait Implementations§
impl RefUnwindSafe for VpcConnectionResourceStatus
impl Send for VpcConnectionResourceStatus
impl Sync for VpcConnectionResourceStatus
impl Unpin for VpcConnectionResourceStatus
impl UnwindSafe for VpcConnectionResourceStatus
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> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.