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