#[non_exhaustive]pub enum InventoryIncludedObjectVersions {
All,
Current,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against InventoryIncludedObjectVersions
, 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 inventoryincludedobjectversions = unimplemented!();
match inventoryincludedobjectversions {
InventoryIncludedObjectVersions::All => { /* ... */ },
InventoryIncludedObjectVersions::Current => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when inventoryincludedobjectversions
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant InventoryIncludedObjectVersions::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
InventoryIncludedObjectVersions::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 InventoryIncludedObjectVersions::NewFeature
is defined.
Specifically, when inventoryincludedobjectversions
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on InventoryIncludedObjectVersions::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
All
Current
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 InventoryIncludedObjectVersions
impl InventoryIncludedObjectVersions
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 InventoryIncludedObjectVersions
impl AsRef<str> for InventoryIncludedObjectVersions
source§impl Clone for InventoryIncludedObjectVersions
impl Clone for InventoryIncludedObjectVersions
source§fn clone(&self) -> InventoryIncludedObjectVersions
fn clone(&self) -> InventoryIncludedObjectVersions
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for InventoryIncludedObjectVersions
impl From<&str> for InventoryIncludedObjectVersions
source§impl Ord for InventoryIncludedObjectVersions
impl Ord for InventoryIncludedObjectVersions
source§fn cmp(&self, other: &InventoryIncludedObjectVersions) -> Ordering
fn cmp(&self, other: &InventoryIncludedObjectVersions) -> 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 InventoryIncludedObjectVersions
impl PartialEq for InventoryIncludedObjectVersions
source§fn eq(&self, other: &InventoryIncludedObjectVersions) -> bool
fn eq(&self, other: &InventoryIncludedObjectVersions) -> bool
self
and other
values to be equal, and is used by ==
.source§impl PartialOrd for InventoryIncludedObjectVersions
impl PartialOrd for InventoryIncludedObjectVersions
impl Eq for InventoryIncludedObjectVersions
impl StructuralPartialEq for InventoryIncludedObjectVersions
Auto Trait Implementations§
impl Freeze for InventoryIncludedObjectVersions
impl RefUnwindSafe for InventoryIncludedObjectVersions
impl Send for InventoryIncludedObjectVersions
impl Sync for InventoryIncludedObjectVersions
impl Unpin for InventoryIncludedObjectVersions
impl UnwindSafe for InventoryIncludedObjectVersions
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<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)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.