#[non_exhaustive]pub enum KmsGrantOperation {
Show 15 variants
CreateGrant,
Decrypt,
DescribeKey,
Encrypt,
GenerateDataKey,
GenerateDataKeyPair,
GenerateDataKeyPairWithoutPlaintext,
GenerateDataKeyWithoutPlaintext,
GetPublicKey,
ReencryptFrom,
ReencryptTo,
RetireGrant,
Sign,
Verify,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against KmsGrantOperation
, 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 kmsgrantoperation = unimplemented!();
match kmsgrantoperation {
KmsGrantOperation::CreateGrant => { /* ... */ },
KmsGrantOperation::Decrypt => { /* ... */ },
KmsGrantOperation::DescribeKey => { /* ... */ },
KmsGrantOperation::Encrypt => { /* ... */ },
KmsGrantOperation::GenerateDataKey => { /* ... */ },
KmsGrantOperation::GenerateDataKeyPair => { /* ... */ },
KmsGrantOperation::GenerateDataKeyPairWithoutPlaintext => { /* ... */ },
KmsGrantOperation::GenerateDataKeyWithoutPlaintext => { /* ... */ },
KmsGrantOperation::GetPublicKey => { /* ... */ },
KmsGrantOperation::ReencryptFrom => { /* ... */ },
KmsGrantOperation::ReencryptTo => { /* ... */ },
KmsGrantOperation::RetireGrant => { /* ... */ },
KmsGrantOperation::Sign => { /* ... */ },
KmsGrantOperation::Verify => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when kmsgrantoperation
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant KmsGrantOperation::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
KmsGrantOperation::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 KmsGrantOperation::NewFeature
is defined.
Specifically, when kmsgrantoperation
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on KmsGrantOperation::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
CreateGrant
Decrypt
DescribeKey
Encrypt
GenerateDataKey
GenerateDataKeyPair
GenerateDataKeyPairWithoutPlaintext
GenerateDataKeyWithoutPlaintext
GetPublicKey
ReencryptFrom
ReencryptTo
RetireGrant
Sign
Verify
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 KmsGrantOperation
impl KmsGrantOperation
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 KmsGrantOperation
impl AsRef<str> for KmsGrantOperation
source§impl Clone for KmsGrantOperation
impl Clone for KmsGrantOperation
source§fn clone(&self) -> KmsGrantOperation
fn clone(&self) -> KmsGrantOperation
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for KmsGrantOperation
impl Debug for KmsGrantOperation
source§impl Display for KmsGrantOperation
impl Display for KmsGrantOperation
source§impl From<&str> for KmsGrantOperation
impl From<&str> for KmsGrantOperation
source§impl FromStr for KmsGrantOperation
impl FromStr for KmsGrantOperation
source§impl Hash for KmsGrantOperation
impl Hash for KmsGrantOperation
source§impl Ord for KmsGrantOperation
impl Ord for KmsGrantOperation
source§fn cmp(&self, other: &KmsGrantOperation) -> Ordering
fn cmp(&self, other: &KmsGrantOperation) -> 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 KmsGrantOperation
impl PartialEq for KmsGrantOperation
source§fn eq(&self, other: &KmsGrantOperation) -> bool
fn eq(&self, other: &KmsGrantOperation) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for KmsGrantOperation
impl PartialOrd for KmsGrantOperation
source§fn partial_cmp(&self, other: &KmsGrantOperation) -> Option<Ordering>
fn partial_cmp(&self, other: &KmsGrantOperation) -> 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 KmsGrantOperation
impl StructuralPartialEq for KmsGrantOperation
Auto Trait Implementations§
impl Freeze for KmsGrantOperation
impl RefUnwindSafe for KmsGrantOperation
impl Send for KmsGrantOperation
impl Sync for KmsGrantOperation
impl Unpin for KmsGrantOperation
impl UnwindSafe for KmsGrantOperation
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<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.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more