#[non_exhaustive]
pub enum DeleteMarkerReplicationStatus {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DeleteMarkerReplicationStatus
, 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 deletemarkerreplicationstatus = unimplemented!();
match deletemarkerreplicationstatus {
DeleteMarkerReplicationStatus::Disabled => { /* ... */ },
DeleteMarkerReplicationStatus::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when deletemarkerreplicationstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DeleteMarkerReplicationStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DeleteMarkerReplicationStatus::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 DeleteMarkerReplicationStatus::NewFeature
is defined.
Specifically, when deletemarkerreplicationstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DeleteMarkerReplicationStatus::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
Disabled
Enabled
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl DeleteMarkerReplicationStatus
impl DeleteMarkerReplicationStatus
sourcepub fn as_str(&self) -> &str
pub fn as_str(&self) -> &str
Returns the &str
value of the enum member.
Examples found in repository?
More examples
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pub fn serialize_structure_crate_model_delete_marker_replication(
input: &crate::model::DeleteMarkerReplication,
writer: aws_smithy_xml::encode::ElWriter,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
#[allow(unused_mut)]
let mut scope = writer.finish();
if let Some(var_216) = &input.status {
let mut inner_writer = scope.start_el("Status").finish();
inner_writer.data(var_216.as_str());
}
scope.finish();
Ok(())
}
Trait Implementations§
source§impl AsRef<str> for DeleteMarkerReplicationStatus
impl AsRef<str> for DeleteMarkerReplicationStatus
source§impl Clone for DeleteMarkerReplicationStatus
impl Clone for DeleteMarkerReplicationStatus
source§fn clone(&self) -> DeleteMarkerReplicationStatus
fn clone(&self) -> DeleteMarkerReplicationStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for DeleteMarkerReplicationStatus
impl From<&str> for DeleteMarkerReplicationStatus
source§impl Hash for DeleteMarkerReplicationStatus
impl Hash for DeleteMarkerReplicationStatus
source§impl Ord for DeleteMarkerReplicationStatus
impl Ord for DeleteMarkerReplicationStatus
source§fn cmp(&self, other: &DeleteMarkerReplicationStatus) -> Ordering
fn cmp(&self, other: &DeleteMarkerReplicationStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<DeleteMarkerReplicationStatus> for DeleteMarkerReplicationStatus
impl PartialEq<DeleteMarkerReplicationStatus> for DeleteMarkerReplicationStatus
source§fn eq(&self, other: &DeleteMarkerReplicationStatus) -> bool
fn eq(&self, other: &DeleteMarkerReplicationStatus) -> bool
source§impl PartialOrd<DeleteMarkerReplicationStatus> for DeleteMarkerReplicationStatus
impl PartialOrd<DeleteMarkerReplicationStatus> for DeleteMarkerReplicationStatus
source§fn partial_cmp(&self, other: &DeleteMarkerReplicationStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &DeleteMarkerReplicationStatus) -> 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 DeleteMarkerReplicationStatus
impl StructuralEq for DeleteMarkerReplicationStatus
impl StructuralPartialEq for DeleteMarkerReplicationStatus
Auto Trait Implementations§
impl RefUnwindSafe for DeleteMarkerReplicationStatus
impl Send for DeleteMarkerReplicationStatus
impl Sync for DeleteMarkerReplicationStatus
impl Unpin for DeleteMarkerReplicationStatus
impl UnwindSafe for DeleteMarkerReplicationStatus
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.