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