#[non_exhaustive]pub enum QuickResponseStatus {
Created,
CreateFailed,
CreateInProgress,
Deleted,
DeleteFailed,
DeleteInProgress,
UpdateFailed,
UpdateInProgress,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against QuickResponseStatus, 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 quickresponsestatus = unimplemented!();
match quickresponsestatus {
QuickResponseStatus::Created => { /* ... */ },
QuickResponseStatus::CreateFailed => { /* ... */ },
QuickResponseStatus::CreateInProgress => { /* ... */ },
QuickResponseStatus::Deleted => { /* ... */ },
QuickResponseStatus::DeleteFailed => { /* ... */ },
QuickResponseStatus::DeleteInProgress => { /* ... */ },
QuickResponseStatus::UpdateFailed => { /* ... */ },
QuickResponseStatus::UpdateInProgress => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when quickresponsestatus represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant QuickResponseStatus::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
QuickResponseStatus::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 QuickResponseStatus::NewFeature is defined.
Specifically, when quickresponsestatus represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on QuickResponseStatus::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis 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
Created
CreateFailed
CreateInProgress
Deleted
DeleteFailed
DeleteInProgress
UpdateFailed
UpdateInProgress
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 QuickResponseStatus
impl QuickResponseStatus
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 QuickResponseStatus
impl AsRef<str> for QuickResponseStatus
source§impl Clone for QuickResponseStatus
impl Clone for QuickResponseStatus
source§fn clone(&self) -> QuickResponseStatus
fn clone(&self) -> QuickResponseStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for QuickResponseStatus
impl Debug for QuickResponseStatus
source§impl From<&str> for QuickResponseStatus
impl From<&str> for QuickResponseStatus
source§impl FromStr for QuickResponseStatus
impl FromStr for QuickResponseStatus
source§impl Hash for QuickResponseStatus
impl Hash for QuickResponseStatus
source§impl Ord for QuickResponseStatus
impl Ord for QuickResponseStatus
source§fn cmp(&self, other: &QuickResponseStatus) -> Ordering
fn cmp(&self, other: &QuickResponseStatus) -> 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 QuickResponseStatus
impl PartialEq for QuickResponseStatus
source§fn eq(&self, other: &QuickResponseStatus) -> bool
fn eq(&self, other: &QuickResponseStatus) -> bool
self and other values to be equal, and is used
by ==.source§impl PartialOrd for QuickResponseStatus
impl PartialOrd for QuickResponseStatus
source§fn partial_cmp(&self, other: &QuickResponseStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &QuickResponseStatus) -> 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 QuickResponseStatus
impl StructuralEq for QuickResponseStatus
impl StructuralPartialEq for QuickResponseStatus
Auto Trait Implementations§
impl RefUnwindSafe for QuickResponseStatus
impl Send for QuickResponseStatus
impl Sync for QuickResponseStatus
impl Unpin for QuickResponseStatus
impl UnwindSafe for QuickResponseStatus
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.