#[non_exhaustive]pub enum BucketLocationConstraint {
Show 29 variants
Eu,
AfSouth1,
ApEast1,
ApNortheast1,
ApNortheast2,
ApNortheast3,
ApSouth1,
ApSouth2,
ApSoutheast1,
ApSoutheast2,
ApSoutheast3,
CaCentral1,
CnNorth1,
CnNorthwest1,
EuCentral1,
EuNorth1,
EuSouth1,
EuSouth2,
EuWest1,
EuWest2,
EuWest3,
MeSouth1,
SaEast1,
UsEast2,
UsGovEast1,
UsGovWest1,
UsWest1,
UsWest2,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against BucketLocationConstraint
, 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 bucketlocationconstraint = unimplemented!();
match bucketlocationconstraint {
BucketLocationConstraint::Eu => { /* ... */ },
BucketLocationConstraint::AfSouth1 => { /* ... */ },
BucketLocationConstraint::ApEast1 => { /* ... */ },
BucketLocationConstraint::ApNortheast1 => { /* ... */ },
BucketLocationConstraint::ApNortheast2 => { /* ... */ },
BucketLocationConstraint::ApNortheast3 => { /* ... */ },
BucketLocationConstraint::ApSouth1 => { /* ... */ },
BucketLocationConstraint::ApSouth2 => { /* ... */ },
BucketLocationConstraint::ApSoutheast1 => { /* ... */ },
BucketLocationConstraint::ApSoutheast2 => { /* ... */ },
BucketLocationConstraint::ApSoutheast3 => { /* ... */ },
BucketLocationConstraint::CaCentral1 => { /* ... */ },
BucketLocationConstraint::CnNorth1 => { /* ... */ },
BucketLocationConstraint::CnNorthwest1 => { /* ... */ },
BucketLocationConstraint::EuCentral1 => { /* ... */ },
BucketLocationConstraint::EuNorth1 => { /* ... */ },
BucketLocationConstraint::EuSouth1 => { /* ... */ },
BucketLocationConstraint::EuSouth2 => { /* ... */ },
BucketLocationConstraint::EuWest1 => { /* ... */ },
BucketLocationConstraint::EuWest2 => { /* ... */ },
BucketLocationConstraint::EuWest3 => { /* ... */ },
BucketLocationConstraint::MeSouth1 => { /* ... */ },
BucketLocationConstraint::SaEast1 => { /* ... */ },
BucketLocationConstraint::UsEast2 => { /* ... */ },
BucketLocationConstraint::UsGovEast1 => { /* ... */ },
BucketLocationConstraint::UsGovWest1 => { /* ... */ },
BucketLocationConstraint::UsWest1 => { /* ... */ },
BucketLocationConstraint::UsWest2 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when bucketlocationconstraint
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant BucketLocationConstraint::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
BucketLocationConstraint::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 BucketLocationConstraint::NewFeature
is defined.
Specifically, when bucketlocationconstraint
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on BucketLocationConstraint::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
Eu
AfSouth1
ApEast1
ApNortheast1
ApNortheast2
ApNortheast3
ApSouth1
ApSouth2
ApSoutheast1
ApSoutheast2
ApSoutheast3
CaCentral1
CnNorth1
CnNorthwest1
EuCentral1
EuNorth1
EuSouth1
EuSouth2
EuWest1
EuWest2
EuWest3
MeSouth1
SaEast1
UsEast2
UsGovEast1
UsGovWest1
UsWest1
UsWest2
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 BucketLocationConstraint
impl BucketLocationConstraint
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 BucketLocationConstraint
impl AsRef<str> for BucketLocationConstraint
source§impl Clone for BucketLocationConstraint
impl Clone for BucketLocationConstraint
source§fn clone(&self) -> BucketLocationConstraint
fn clone(&self) -> BucketLocationConstraint
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for BucketLocationConstraint
impl Debug for BucketLocationConstraint
source§impl Display for BucketLocationConstraint
impl Display for BucketLocationConstraint
source§impl From<&str> for BucketLocationConstraint
impl From<&str> for BucketLocationConstraint
source§impl FromStr for BucketLocationConstraint
impl FromStr for BucketLocationConstraint
source§impl Hash for BucketLocationConstraint
impl Hash for BucketLocationConstraint
source§impl Ord for BucketLocationConstraint
impl Ord for BucketLocationConstraint
source§fn cmp(&self, other: &BucketLocationConstraint) -> Ordering
fn cmp(&self, other: &BucketLocationConstraint) -> 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 BucketLocationConstraint
impl PartialEq for BucketLocationConstraint
source§impl PartialOrd for BucketLocationConstraint
impl PartialOrd for BucketLocationConstraint
impl Eq for BucketLocationConstraint
impl StructuralPartialEq for BucketLocationConstraint
Auto Trait Implementations§
impl Freeze for BucketLocationConstraint
impl RefUnwindSafe for BucketLocationConstraint
impl Send for BucketLocationConstraint
impl Sync for BucketLocationConstraint
impl Unpin for BucketLocationConstraint
impl UnwindSafe for BucketLocationConstraint
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.