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