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