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