#[non_exhaustive]
pub enum InferredWorkloadTypesPreference {
Active,
Inactive,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against InferredWorkloadTypesPreference
, 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 inferredworkloadtypespreference = unimplemented!();
match inferredworkloadtypespreference {
InferredWorkloadTypesPreference::Active => { /* ... */ },
InferredWorkloadTypesPreference::Inactive => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when inferredworkloadtypespreference
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant InferredWorkloadTypesPreference::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
InferredWorkloadTypesPreference::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 InferredWorkloadTypesPreference::NewFeature
is defined.
Specifically, when inferredworkloadtypespreference
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on InferredWorkloadTypesPreference::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
Active
Inactive
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl InferredWorkloadTypesPreference
impl InferredWorkloadTypesPreference
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
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
pub fn serialize_structure_crate_input_put_recommendation_preferences_input(
object: &mut aws_smithy_json::serialize::JsonObjectWriter,
input: &crate::input::PutRecommendationPreferencesInput,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
if let Some(var_147) = &input.resource_type {
object.key("resourceType").string(var_147.as_str());
}
if let Some(var_148) = &input.scope {
#[allow(unused_mut)]
let mut object_149 = object.key("scope").start_object();
crate::json_ser::serialize_structure_crate_model_scope(&mut object_149, var_148)?;
object_149.finish();
}
if let Some(var_150) = &input.enhanced_infrastructure_metrics {
object
.key("enhancedInfrastructureMetrics")
.string(var_150.as_str());
}
if let Some(var_151) = &input.inferred_workload_types {
object.key("inferredWorkloadTypes").string(var_151.as_str());
}
Ok(())
}
Trait Implementations§
source§impl AsRef<str> for InferredWorkloadTypesPreference
impl AsRef<str> for InferredWorkloadTypesPreference
source§impl Clone for InferredWorkloadTypesPreference
impl Clone for InferredWorkloadTypesPreference
source§fn clone(&self) -> InferredWorkloadTypesPreference
fn clone(&self) -> InferredWorkloadTypesPreference
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 InferredWorkloadTypesPreference
impl From<&str> for InferredWorkloadTypesPreference
source§impl Ord for InferredWorkloadTypesPreference
impl Ord for InferredWorkloadTypesPreference
source§fn cmp(&self, other: &InferredWorkloadTypesPreference) -> Ordering
fn cmp(&self, other: &InferredWorkloadTypesPreference) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<InferredWorkloadTypesPreference> for InferredWorkloadTypesPreference
impl PartialEq<InferredWorkloadTypesPreference> for InferredWorkloadTypesPreference
source§fn eq(&self, other: &InferredWorkloadTypesPreference) -> bool
fn eq(&self, other: &InferredWorkloadTypesPreference) -> bool
source§impl PartialOrd<InferredWorkloadTypesPreference> for InferredWorkloadTypesPreference
impl PartialOrd<InferredWorkloadTypesPreference> for InferredWorkloadTypesPreference
source§fn partial_cmp(
&self,
other: &InferredWorkloadTypesPreference
) -> Option<Ordering>
fn partial_cmp(
&self,
other: &InferredWorkloadTypesPreference
) -> 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 InferredWorkloadTypesPreference
impl StructuralEq for InferredWorkloadTypesPreference
impl StructuralPartialEq for InferredWorkloadTypesPreference
Auto Trait Implementations§
impl RefUnwindSafe for InferredWorkloadTypesPreference
impl Send for InferredWorkloadTypesPreference
impl Sync for InferredWorkloadTypesPreference
impl Unpin for InferredWorkloadTypesPreference
impl UnwindSafe for InferredWorkloadTypesPreference
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.