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