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