Enum aws_sdk_s3::types::ObjectStorageClass
source · #[non_exhaustive]pub enum ObjectStorageClass {
DeepArchive,
ExpressOnezone,
Glacier,
GlacierIr,
IntelligentTiering,
OnezoneIa,
Outposts,
ReducedRedundancy,
Snow,
Standard,
StandardIa,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ObjectStorageClass
, 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 objectstorageclass = unimplemented!();
match objectstorageclass {
ObjectStorageClass::DeepArchive => { /* ... */ },
ObjectStorageClass::ExpressOnezone => { /* ... */ },
ObjectStorageClass::Glacier => { /* ... */ },
ObjectStorageClass::GlacierIr => { /* ... */ },
ObjectStorageClass::IntelligentTiering => { /* ... */ },
ObjectStorageClass::OnezoneIa => { /* ... */ },
ObjectStorageClass::Outposts => { /* ... */ },
ObjectStorageClass::ReducedRedundancy => { /* ... */ },
ObjectStorageClass::Snow => { /* ... */ },
ObjectStorageClass::Standard => { /* ... */ },
ObjectStorageClass::StandardIa => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when objectstorageclass
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ObjectStorageClass::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ObjectStorageClass::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 ObjectStorageClass::NewFeature
is defined.
Specifically, when objectstorageclass
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ObjectStorageClass::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
DeepArchive
ExpressOnezone
Glacier
GlacierIr
IntelligentTiering
OnezoneIa
Outposts
ReducedRedundancy
Snow
Standard
StandardIa
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 ObjectStorageClass
impl ObjectStorageClass
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 ObjectStorageClass
impl AsRef<str> for ObjectStorageClass
source§impl Clone for ObjectStorageClass
impl Clone for ObjectStorageClass
source§fn clone(&self) -> ObjectStorageClass
fn clone(&self) -> ObjectStorageClass
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ObjectStorageClass
impl Debug for ObjectStorageClass
source§impl Display for ObjectStorageClass
impl Display for ObjectStorageClass
source§impl From<&str> for ObjectStorageClass
impl From<&str> for ObjectStorageClass
source§impl FromStr for ObjectStorageClass
impl FromStr for ObjectStorageClass
source§impl Hash for ObjectStorageClass
impl Hash for ObjectStorageClass
source§impl Ord for ObjectStorageClass
impl Ord for ObjectStorageClass
source§fn cmp(&self, other: &ObjectStorageClass) -> Ordering
fn cmp(&self, other: &ObjectStorageClass) -> 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 ObjectStorageClass
impl PartialEq for ObjectStorageClass
source§impl PartialOrd for ObjectStorageClass
impl PartialOrd for ObjectStorageClass
impl Eq for ObjectStorageClass
impl StructuralPartialEq for ObjectStorageClass
Auto Trait Implementations§
impl Freeze for ObjectStorageClass
impl RefUnwindSafe for ObjectStorageClass
impl Send for ObjectStorageClass
impl Sync for ObjectStorageClass
impl Unpin for ObjectStorageClass
impl UnwindSafe for ObjectStorageClass
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.