#[non_exhaustive]pub enum ApiKeySourceType {
Authorizer,
Header,
Unknown(UnknownVariantValue),
}Expand description
When writing a match expression against ApiKeySourceType, 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 apikeysourcetype = unimplemented!();
match apikeysourcetype {
ApiKeySourceType::Authorizer => { /* ... */ },
ApiKeySourceType::Header => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when apikeysourcetype represents
NewFeature, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ApiKeySourceType::NewFeature
in the current version of SDK. The reason is that the variable other,
created by the @ operator, is bound to
ApiKeySourceType::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 ApiKeySourceType::NewFeature is defined.
Specifically, when apikeysourcetype represents NewFeature,
the execution path will hit the second last match arm as before by virtue of
calling as_str on ApiKeySourceType::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
Authorizer
Header
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 ApiKeySourceType
impl ApiKeySourceType
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 ApiKeySourceType
impl AsRef<str> for ApiKeySourceType
source§impl Clone for ApiKeySourceType
impl Clone for ApiKeySourceType
source§fn clone(&self) -> ApiKeySourceType
fn clone(&self) -> ApiKeySourceType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moresource§impl Debug for ApiKeySourceType
impl Debug for ApiKeySourceType
source§impl Display for ApiKeySourceType
impl Display for ApiKeySourceType
source§impl From<&str> for ApiKeySourceType
impl From<&str> for ApiKeySourceType
source§impl FromStr for ApiKeySourceType
impl FromStr for ApiKeySourceType
source§impl Hash for ApiKeySourceType
impl Hash for ApiKeySourceType
source§impl Ord for ApiKeySourceType
impl Ord for ApiKeySourceType
source§fn cmp(&self, other: &ApiKeySourceType) -> Ordering
fn cmp(&self, other: &ApiKeySourceType) -> 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 ApiKeySourceType
impl PartialEq for ApiKeySourceType
source§impl PartialOrd for ApiKeySourceType
impl PartialOrd for ApiKeySourceType
impl Eq for ApiKeySourceType
impl StructuralPartialEq for ApiKeySourceType
Auto Trait Implementations§
impl Freeze for ApiKeySourceType
impl RefUnwindSafe for ApiKeySourceType
impl Send for ApiKeySourceType
impl Sync for ApiKeySourceType
impl Unpin for ApiKeySourceType
impl UnwindSafe for ApiKeySourceType
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
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit)source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more