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