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