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