#[non_exhaustive]pub enum ServiceConnectivityType {
Ipv4,
Ipv6,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ServiceConnectivityType
, 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 serviceconnectivitytype = unimplemented!();
match serviceconnectivitytype {
ServiceConnectivityType::Ipv4 => { /* ... */ },
ServiceConnectivityType::Ipv6 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when serviceconnectivitytype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ServiceConnectivityType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ServiceConnectivityType::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 ServiceConnectivityType::NewFeature
is defined.
Specifically, when serviceconnectivitytype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ServiceConnectivityType::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
Ipv4
Ipv6
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 ServiceConnectivityType
impl ServiceConnectivityType
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 ServiceConnectivityType
impl AsRef<str> for ServiceConnectivityType
Source§impl Clone for ServiceConnectivityType
impl Clone for ServiceConnectivityType
Source§fn clone(&self) -> ServiceConnectivityType
fn clone(&self) -> ServiceConnectivityType
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for ServiceConnectivityType
impl Debug for ServiceConnectivityType
Source§impl Display for ServiceConnectivityType
impl Display for ServiceConnectivityType
Source§impl From<&str> for ServiceConnectivityType
impl From<&str> for ServiceConnectivityType
Source§impl FromStr for ServiceConnectivityType
impl FromStr for ServiceConnectivityType
Source§impl Hash for ServiceConnectivityType
impl Hash for ServiceConnectivityType
Source§impl Ord for ServiceConnectivityType
impl Ord for ServiceConnectivityType
Source§fn cmp(&self, other: &ServiceConnectivityType) -> Ordering
fn cmp(&self, other: &ServiceConnectivityType) -> 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 ServiceConnectivityType
impl PartialEq for ServiceConnectivityType
Source§impl PartialOrd for ServiceConnectivityType
impl PartialOrd for ServiceConnectivityType
impl Eq for ServiceConnectivityType
impl StructuralPartialEq for ServiceConnectivityType
Auto Trait Implementations§
impl Freeze for ServiceConnectivityType
impl RefUnwindSafe for ServiceConnectivityType
impl Send for ServiceConnectivityType
impl Sync for ServiceConnectivityType
impl Unpin for ServiceConnectivityType
impl UnwindSafe for ServiceConnectivityType
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