Enum aws_sdk_fsx::types::WindowsDeploymentType
source · #[non_exhaustive]pub enum WindowsDeploymentType {
MultiAz1,
SingleAz1,
SingleAz2,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against WindowsDeploymentType
, 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 windowsdeploymenttype = unimplemented!();
match windowsdeploymenttype {
WindowsDeploymentType::MultiAz1 => { /* ... */ },
WindowsDeploymentType::SingleAz1 => { /* ... */ },
WindowsDeploymentType::SingleAz2 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when windowsdeploymenttype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant WindowsDeploymentType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
WindowsDeploymentType::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 WindowsDeploymentType::NewFeature
is defined.
Specifically, when windowsdeploymenttype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on WindowsDeploymentType::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
MultiAz1
SingleAz1
SingleAz2
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 WindowsDeploymentType
impl WindowsDeploymentType
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 WindowsDeploymentType
impl AsRef<str> for WindowsDeploymentType
source§impl Clone for WindowsDeploymentType
impl Clone for WindowsDeploymentType
source§fn clone(&self) -> WindowsDeploymentType
fn clone(&self) -> WindowsDeploymentType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for WindowsDeploymentType
impl Debug for WindowsDeploymentType
source§impl Display for WindowsDeploymentType
impl Display for WindowsDeploymentType
source§impl From<&str> for WindowsDeploymentType
impl From<&str> for WindowsDeploymentType
source§impl FromStr for WindowsDeploymentType
impl FromStr for WindowsDeploymentType
source§impl Hash for WindowsDeploymentType
impl Hash for WindowsDeploymentType
source§impl Ord for WindowsDeploymentType
impl Ord for WindowsDeploymentType
source§fn cmp(&self, other: &WindowsDeploymentType) -> Ordering
fn cmp(&self, other: &WindowsDeploymentType) -> 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 WindowsDeploymentType
impl PartialEq for WindowsDeploymentType
source§fn eq(&self, other: &WindowsDeploymentType) -> bool
fn eq(&self, other: &WindowsDeploymentType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for WindowsDeploymentType
impl PartialOrd for WindowsDeploymentType
source§fn partial_cmp(&self, other: &WindowsDeploymentType) -> Option<Ordering>
fn partial_cmp(&self, other: &WindowsDeploymentType) -> 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 WindowsDeploymentType
impl StructuralPartialEq for WindowsDeploymentType
Auto Trait Implementations§
impl Freeze for WindowsDeploymentType
impl RefUnwindSafe for WindowsDeploymentType
impl Send for WindowsDeploymentType
impl Sync for WindowsDeploymentType
impl Unpin for WindowsDeploymentType
impl UnwindSafe for WindowsDeploymentType
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.