#[non_exhaustive]pub enum ArtifactPackaging {
None,
Zip,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ArtifactPackaging
, 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 artifactpackaging = unimplemented!();
match artifactpackaging {
ArtifactPackaging::None => { /* ... */ },
ArtifactPackaging::Zip => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when artifactpackaging
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ArtifactPackaging::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ArtifactPackaging::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 ArtifactPackaging::NewFeature
is defined.
Specifically, when artifactpackaging
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ArtifactPackaging::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
None
Zip
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 ArtifactPackaging
impl ArtifactPackaging
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 ArtifactPackaging
impl AsRef<str> for ArtifactPackaging
source§impl Clone for ArtifactPackaging
impl Clone for ArtifactPackaging
source§fn clone(&self) -> ArtifactPackaging
fn clone(&self) -> ArtifactPackaging
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ArtifactPackaging
impl Debug for ArtifactPackaging
source§impl From<&str> for ArtifactPackaging
impl From<&str> for ArtifactPackaging
source§impl FromStr for ArtifactPackaging
impl FromStr for ArtifactPackaging
source§impl Hash for ArtifactPackaging
impl Hash for ArtifactPackaging
source§impl Ord for ArtifactPackaging
impl Ord for ArtifactPackaging
source§fn cmp(&self, other: &ArtifactPackaging) -> Ordering
fn cmp(&self, other: &ArtifactPackaging) -> 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 ArtifactPackaging
impl PartialEq for ArtifactPackaging
source§fn eq(&self, other: &ArtifactPackaging) -> bool
fn eq(&self, other: &ArtifactPackaging) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ArtifactPackaging
impl PartialOrd for ArtifactPackaging
source§fn partial_cmp(&self, other: &ArtifactPackaging) -> Option<Ordering>
fn partial_cmp(&self, other: &ArtifactPackaging) -> 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 ArtifactPackaging
impl StructuralEq for ArtifactPackaging
impl StructuralPartialEq for ArtifactPackaging
Auto Trait Implementations§
impl RefUnwindSafe for ArtifactPackaging
impl Send for ArtifactPackaging
impl Sync for ArtifactPackaging
impl Unpin for ArtifactPackaging
impl UnwindSafe for ArtifactPackaging
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.