#[non_exhaustive]
pub enum ArtifactSourceIdType {
Custom,
Md5Hash,
S3Etag,
S3Version,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ArtifactSourceIdType
, 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 artifactsourceidtype = unimplemented!();
match artifactsourceidtype {
ArtifactSourceIdType::Custom => { /* ... */ },
ArtifactSourceIdType::Md5Hash => { /* ... */ },
ArtifactSourceIdType::S3Etag => { /* ... */ },
ArtifactSourceIdType::S3Version => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when artifactsourceidtype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ArtifactSourceIdType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ArtifactSourceIdType::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 ArtifactSourceIdType::NewFeature
is defined.
Specifically, when artifactsourceidtype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ArtifactSourceIdType::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
Custom
Md5Hash
S3Etag
S3Version
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for ArtifactSourceIdType
impl AsRef<str> for ArtifactSourceIdType
source§impl Clone for ArtifactSourceIdType
impl Clone for ArtifactSourceIdType
source§fn clone(&self) -> ArtifactSourceIdType
fn clone(&self) -> ArtifactSourceIdType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ArtifactSourceIdType
impl Debug for ArtifactSourceIdType
source§impl From<&str> for ArtifactSourceIdType
impl From<&str> for ArtifactSourceIdType
source§impl FromStr for ArtifactSourceIdType
impl FromStr for ArtifactSourceIdType
source§impl Hash for ArtifactSourceIdType
impl Hash for ArtifactSourceIdType
source§impl Ord for ArtifactSourceIdType
impl Ord for ArtifactSourceIdType
source§fn cmp(&self, other: &ArtifactSourceIdType) -> Ordering
fn cmp(&self, other: &ArtifactSourceIdType) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<ArtifactSourceIdType> for ArtifactSourceIdType
impl PartialEq<ArtifactSourceIdType> for ArtifactSourceIdType
source§fn eq(&self, other: &ArtifactSourceIdType) -> bool
fn eq(&self, other: &ArtifactSourceIdType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<ArtifactSourceIdType> for ArtifactSourceIdType
impl PartialOrd<ArtifactSourceIdType> for ArtifactSourceIdType
source§fn partial_cmp(&self, other: &ArtifactSourceIdType) -> Option<Ordering>
fn partial_cmp(&self, other: &ArtifactSourceIdType) -> 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 ArtifactSourceIdType
impl StructuralEq for ArtifactSourceIdType
impl StructuralPartialEq for ArtifactSourceIdType
Auto Trait Implementations§
impl RefUnwindSafe for ArtifactSourceIdType
impl Send for ArtifactSourceIdType
impl Sync for ArtifactSourceIdType
impl Unpin for ArtifactSourceIdType
impl UnwindSafe for ArtifactSourceIdType
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.