Enum aws_sdk_s3::types::RequestCharged
source · #[non_exhaustive]pub enum RequestCharged {
Requester,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against RequestCharged
, 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 requestcharged = unimplemented!();
match requestcharged {
RequestCharged::Requester => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when requestcharged
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant RequestCharged::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
RequestCharged::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 RequestCharged::NewFeature
is defined.
Specifically, when requestcharged
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on RequestCharged::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.
If present, indicates that the requester was successfully charged for the request.
This functionality is not supported for directory buckets.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Requester
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 RequestCharged
impl RequestCharged
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 RequestCharged
impl AsRef<str> for RequestCharged
source§impl Clone for RequestCharged
impl Clone for RequestCharged
source§fn clone(&self) -> RequestCharged
fn clone(&self) -> RequestCharged
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for RequestCharged
impl Debug for RequestCharged
source§impl Display for RequestCharged
impl Display for RequestCharged
source§impl From<&str> for RequestCharged
impl From<&str> for RequestCharged
source§impl FromStr for RequestCharged
impl FromStr for RequestCharged
source§impl Hash for RequestCharged
impl Hash for RequestCharged
source§impl Ord for RequestCharged
impl Ord for RequestCharged
source§fn cmp(&self, other: &RequestCharged) -> Ordering
fn cmp(&self, other: &RequestCharged) -> 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 RequestCharged
impl PartialEq for RequestCharged
source§impl PartialOrd for RequestCharged
impl PartialOrd for RequestCharged
impl Eq for RequestCharged
impl StructuralPartialEq for RequestCharged
Auto Trait Implementations§
impl Freeze for RequestCharged
impl RefUnwindSafe for RequestCharged
impl Send for RequestCharged
impl Sync for RequestCharged
impl Unpin for RequestCharged
impl UnwindSafe for RequestCharged
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.