#[non_exhaustive]pub enum ArtifactLocationType {
S3,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ArtifactLocationType
, 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 artifactlocationtype = unimplemented!();
match artifactlocationtype {
ArtifactLocationType::S3 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when artifactlocationtype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ArtifactLocationType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ArtifactLocationType::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 ArtifactLocationType::NewFeature
is defined.
Specifically, when artifactlocationtype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ArtifactLocationType::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
S3
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 ArtifactLocationType
impl ArtifactLocationType
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 ArtifactLocationType
impl AsRef<str> for ArtifactLocationType
source§impl Clone for ArtifactLocationType
impl Clone for ArtifactLocationType
source§fn clone(&self) -> ArtifactLocationType
fn clone(&self) -> ArtifactLocationType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ArtifactLocationType
impl Debug for ArtifactLocationType
source§impl From<&str> for ArtifactLocationType
impl From<&str> for ArtifactLocationType
source§impl FromStr for ArtifactLocationType
impl FromStr for ArtifactLocationType
source§impl Hash for ArtifactLocationType
impl Hash for ArtifactLocationType
source§impl Ord for ArtifactLocationType
impl Ord for ArtifactLocationType
source§fn cmp(&self, other: &ArtifactLocationType) -> Ordering
fn cmp(&self, other: &ArtifactLocationType) -> 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 ArtifactLocationType
impl PartialEq for ArtifactLocationType
source§fn eq(&self, other: &ArtifactLocationType) -> bool
fn eq(&self, other: &ArtifactLocationType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ArtifactLocationType
impl PartialOrd for ArtifactLocationType
source§fn partial_cmp(&self, other: &ArtifactLocationType) -> Option<Ordering>
fn partial_cmp(&self, other: &ArtifactLocationType) -> 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 ArtifactLocationType
impl StructuralEq for ArtifactLocationType
impl StructuralPartialEq for ArtifactLocationType
Auto Trait Implementations§
impl RefUnwindSafe for ArtifactLocationType
impl Send for ArtifactLocationType
impl Sync for ArtifactLocationType
impl Unpin for ArtifactLocationType
impl UnwindSafe for ArtifactLocationType
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.