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