#[non_exhaustive]pub enum DecryptionMode {
AesCbc,
AesCtr,
AesGcm,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DecryptionMode
, 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 decryptionmode = unimplemented!();
match decryptionmode {
DecryptionMode::AesCbc => { /* ... */ },
DecryptionMode::AesCtr => { /* ... */ },
DecryptionMode::AesGcm => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when decryptionmode
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DecryptionMode::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DecryptionMode::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 DecryptionMode::NewFeature
is defined.
Specifically, when decryptionmode
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DecryptionMode::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. Specify the encryption mode that you used to encrypt your input files.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
AesCbc
AesCtr
AesGcm
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 DecryptionMode
impl DecryptionMode
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 DecryptionMode
impl AsRef<str> for DecryptionMode
source§impl Clone for DecryptionMode
impl Clone for DecryptionMode
source§fn clone(&self) -> DecryptionMode
fn clone(&self) -> DecryptionMode
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DecryptionMode
impl Debug for DecryptionMode
source§impl Display for DecryptionMode
impl Display for DecryptionMode
source§impl From<&str> for DecryptionMode
impl From<&str> for DecryptionMode
source§impl FromStr for DecryptionMode
impl FromStr for DecryptionMode
source§impl Hash for DecryptionMode
impl Hash for DecryptionMode
source§impl Ord for DecryptionMode
impl Ord for DecryptionMode
source§fn cmp(&self, other: &DecryptionMode) -> Ordering
fn cmp(&self, other: &DecryptionMode) -> 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 DecryptionMode
impl PartialEq for DecryptionMode
source§fn eq(&self, other: &DecryptionMode) -> bool
fn eq(&self, other: &DecryptionMode) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DecryptionMode
impl PartialOrd for DecryptionMode
source§fn partial_cmp(&self, other: &DecryptionMode) -> Option<Ordering>
fn partial_cmp(&self, other: &DecryptionMode) -> 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 DecryptionMode
impl StructuralPartialEq for DecryptionMode
Auto Trait Implementations§
impl Freeze for DecryptionMode
impl RefUnwindSafe for DecryptionMode
impl Send for DecryptionMode
impl Sync for DecryptionMode
impl Unpin for DecryptionMode
impl UnwindSafe for DecryptionMode
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