#[non_exhaustive]pub enum SecurityPolicyType {
Encryption,
Network,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against SecurityPolicyType
, 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 securitypolicytype = unimplemented!();
match securitypolicytype {
SecurityPolicyType::Encryption => { /* ... */ },
SecurityPolicyType::Network => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when securitypolicytype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant SecurityPolicyType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
SecurityPolicyType::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 SecurityPolicyType::NewFeature
is defined.
Specifically, when securitypolicytype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on SecurityPolicyType::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
Encryption
encryption policy type
Network
network policy type
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for SecurityPolicyType
impl AsRef<str> for SecurityPolicyType
source§impl Clone for SecurityPolicyType
impl Clone for SecurityPolicyType
source§fn clone(&self) -> SecurityPolicyType
fn clone(&self) -> SecurityPolicyType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for SecurityPolicyType
impl Debug for SecurityPolicyType
source§impl From<&str> for SecurityPolicyType
impl From<&str> for SecurityPolicyType
source§impl FromStr for SecurityPolicyType
impl FromStr for SecurityPolicyType
source§impl Hash for SecurityPolicyType
impl Hash for SecurityPolicyType
source§impl Ord for SecurityPolicyType
impl Ord for SecurityPolicyType
source§fn cmp(&self, other: &SecurityPolicyType) -> Ordering
fn cmp(&self, other: &SecurityPolicyType) -> 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 SecurityPolicyType
impl PartialEq for SecurityPolicyType
source§fn eq(&self, other: &SecurityPolicyType) -> bool
fn eq(&self, other: &SecurityPolicyType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for SecurityPolicyType
impl PartialOrd for SecurityPolicyType
source§fn partial_cmp(&self, other: &SecurityPolicyType) -> Option<Ordering>
fn partial_cmp(&self, other: &SecurityPolicyType) -> 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 SecurityPolicyType
impl StructuralEq for SecurityPolicyType
impl StructuralPartialEq for SecurityPolicyType
Auto Trait Implementations§
impl RefUnwindSafe for SecurityPolicyType
impl Send for SecurityPolicyType
impl Sync for SecurityPolicyType
impl Unpin for SecurityPolicyType
impl UnwindSafe for SecurityPolicyType
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
§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.