#[non_exhaustive]
pub enum ComplianceStatus {
Failed,
NotAvailable,
Passed,
Warning,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ComplianceStatus
, 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 compliancestatus = unimplemented!();
match compliancestatus {
ComplianceStatus::Failed => { /* ... */ },
ComplianceStatus::NotAvailable => { /* ... */ },
ComplianceStatus::Passed => { /* ... */ },
ComplianceStatus::Warning => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when compliancestatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ComplianceStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ComplianceStatus::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 ComplianceStatus::NewFeature
is defined.
Specifically, when compliancestatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ComplianceStatus::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
Failed
NotAvailable
Passed
Warning
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl ComplianceStatus
impl ComplianceStatus
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_compliance(
object: &mut aws_smithy_json::serialize::JsonObjectWriter,
input: &crate::model::Compliance,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
if let Some(var_648) = &input.status {
object.key("Status").string(var_648.as_str());
}
if let Some(var_649) = &input.related_requirements {
let mut array_650 = object.key("RelatedRequirements").start_array();
for item_651 in var_649 {
{
array_650.value().string(item_651.as_str());
}
}
array_650.finish();
}
if let Some(var_652) = &input.status_reasons {
let mut array_653 = object.key("StatusReasons").start_array();
for item_654 in var_652 {
{
#[allow(unused_mut)]
let mut object_655 = array_653.value().start_object();
crate::json_ser::serialize_structure_crate_model_status_reason(
&mut object_655,
item_654,
)?;
object_655.finish();
}
}
array_653.finish();
}
Ok(())
}
Trait Implementations§
source§impl AsRef<str> for ComplianceStatus
impl AsRef<str> for ComplianceStatus
source§impl Clone for ComplianceStatus
impl Clone for ComplianceStatus
source§fn clone(&self) -> ComplianceStatus
fn clone(&self) -> ComplianceStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ComplianceStatus
impl Debug for ComplianceStatus
source§impl From<&str> for ComplianceStatus
impl From<&str> for ComplianceStatus
source§impl FromStr for ComplianceStatus
impl FromStr for ComplianceStatus
source§impl Hash for ComplianceStatus
impl Hash for ComplianceStatus
source§impl Ord for ComplianceStatus
impl Ord for ComplianceStatus
source§fn cmp(&self, other: &ComplianceStatus) -> Ordering
fn cmp(&self, other: &ComplianceStatus) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<ComplianceStatus> for ComplianceStatus
impl PartialEq<ComplianceStatus> for ComplianceStatus
source§fn eq(&self, other: &ComplianceStatus) -> bool
fn eq(&self, other: &ComplianceStatus) -> bool
source§impl PartialOrd<ComplianceStatus> for ComplianceStatus
impl PartialOrd<ComplianceStatus> for ComplianceStatus
source§fn partial_cmp(&self, other: &ComplianceStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &ComplianceStatus) -> 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 ComplianceStatus
impl StructuralEq for ComplianceStatus
impl StructuralPartialEq for ComplianceStatus
Auto Trait Implementations§
impl RefUnwindSafe for ComplianceStatus
impl Send for ComplianceStatus
impl Sync for ComplianceStatus
impl Unpin for ComplianceStatus
impl UnwindSafe for ComplianceStatus
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.