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