#[non_exhaustive]
pub enum RecommendationCategory {
AwsBestPractices,
AwsCloudformationIssues,
CodeInconsistencies,
CodeMaintenanceIssues,
ConcurrencyIssues,
DuplicateCode,
InputValidations,
JavaBestPractices,
PythonBestPractices,
ResourceLeaks,
SecurityIssues,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against RecommendationCategory, 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 recommendationcategory = unimplemented!();
match recommendationcategory {
RecommendationCategory::AwsBestPractices => { /* ... */ },
RecommendationCategory::AwsCloudformationIssues => { /* ... */ },
RecommendationCategory::CodeInconsistencies => { /* ... */ },
RecommendationCategory::CodeMaintenanceIssues => { /* ... */ },
RecommendationCategory::ConcurrencyIssues => { /* ... */ },
RecommendationCategory::DuplicateCode => { /* ... */ },
RecommendationCategory::InputValidations => { /* ... */ },
RecommendationCategory::JavaBestPractices => { /* ... */ },
RecommendationCategory::PythonBestPractices => { /* ... */ },
RecommendationCategory::ResourceLeaks => { /* ... */ },
RecommendationCategory::SecurityIssues => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when recommendationcategory represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant RecommendationCategory::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
RecommendationCategory::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 RecommendationCategory::NewFeature is defined.
Specifically, when recommendationcategory represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on RecommendationCategory::NewFeature also yielding "NewFeature".
Explicitly matching on the Unknown variant should
be avoided for two reasons:
- The inner data
UnknownVariantValueis 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
AwsBestPractices
AwsCloudformationIssues
CodeInconsistencies
CodeMaintenanceIssues
ConcurrencyIssues
DuplicateCode
InputValidations
JavaBestPractices
PythonBestPractices
ResourceLeaks
SecurityIssues
Unknown(UnknownVariantValue)
Unknown contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for RecommendationCategory
impl AsRef<str> for RecommendationCategory
source§impl Clone for RecommendationCategory
impl Clone for RecommendationCategory
source§fn clone(&self) -> RecommendationCategory
fn clone(&self) -> RecommendationCategory
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for RecommendationCategory
impl Debug for RecommendationCategory
source§impl From<&str> for RecommendationCategory
impl From<&str> for RecommendationCategory
source§impl FromStr for RecommendationCategory
impl FromStr for RecommendationCategory
source§impl Hash for RecommendationCategory
impl Hash for RecommendationCategory
source§impl Ord for RecommendationCategory
impl Ord for RecommendationCategory
source§fn cmp(&self, other: &RecommendationCategory) -> Ordering
fn cmp(&self, other: &RecommendationCategory) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<RecommendationCategory> for RecommendationCategory
impl PartialEq<RecommendationCategory> for RecommendationCategory
source§fn eq(&self, other: &RecommendationCategory) -> bool
fn eq(&self, other: &RecommendationCategory) -> bool
source§impl PartialOrd<RecommendationCategory> for RecommendationCategory
impl PartialOrd<RecommendationCategory> for RecommendationCategory
source§fn partial_cmp(&self, other: &RecommendationCategory) -> Option<Ordering>
fn partial_cmp(&self, other: &RecommendationCategory) -> 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 RecommendationCategory
impl StructuralEq for RecommendationCategory
impl StructuralPartialEq for RecommendationCategory
Auto Trait Implementations§
impl RefUnwindSafe for RecommendationCategory
impl Send for RecommendationCategory
impl Sync for RecommendationCategory
impl Unpin for RecommendationCategory
impl UnwindSafe for RecommendationCategory
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.