#[non_exhaustive]pub enum HandlerErrorCode {
Show 20 variants
AccessDenied,
AlreadyExists,
GeneralServiceException,
HandlerInternalFailure,
InternalFailure,
InvalidCredentials,
InvalidRequest,
InvalidTypeConfiguration,
NetworkFailure,
NonCompliant,
NotFound,
ServiceTimeout,
NotUpdatable,
ResourceConflict,
ServiceInternalError,
ServiceLimitExceeded,
Throttling,
UnknownValue,
UnsupportedTarget,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HandlerErrorCode
, 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 handlererrorcode = unimplemented!();
match handlererrorcode {
HandlerErrorCode::AccessDenied => { /* ... */ },
HandlerErrorCode::AlreadyExists => { /* ... */ },
HandlerErrorCode::GeneralServiceException => { /* ... */ },
HandlerErrorCode::HandlerInternalFailure => { /* ... */ },
HandlerErrorCode::InternalFailure => { /* ... */ },
HandlerErrorCode::InvalidCredentials => { /* ... */ },
HandlerErrorCode::InvalidRequest => { /* ... */ },
HandlerErrorCode::InvalidTypeConfiguration => { /* ... */ },
HandlerErrorCode::NetworkFailure => { /* ... */ },
HandlerErrorCode::NonCompliant => { /* ... */ },
HandlerErrorCode::NotFound => { /* ... */ },
HandlerErrorCode::ServiceTimeout => { /* ... */ },
HandlerErrorCode::NotUpdatable => { /* ... */ },
HandlerErrorCode::ResourceConflict => { /* ... */ },
HandlerErrorCode::ServiceInternalError => { /* ... */ },
HandlerErrorCode::ServiceLimitExceeded => { /* ... */ },
HandlerErrorCode::Throttling => { /* ... */ },
HandlerErrorCode::UnknownValue => { /* ... */ },
HandlerErrorCode::UnsupportedTarget => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when handlererrorcode
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HandlerErrorCode::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HandlerErrorCode::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 HandlerErrorCode::NewFeature
is defined.
Specifically, when handlererrorcode
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HandlerErrorCode::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.
Note:
HandlerErrorCode::Unknown
has been renamed to::UnknownValue
.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
AccessDenied
AlreadyExists
GeneralServiceException
HandlerInternalFailure
InternalFailure
InvalidCredentials
InvalidRequest
InvalidTypeConfiguration
NetworkFailure
NonCompliant
NotFound
ServiceTimeout
NotUpdatable
ResourceConflict
ServiceInternalError
ServiceLimitExceeded
Throttling
UnknownValue
Note: ::Unknown
has been renamed to ::UnknownValue
.
UnsupportedTarget
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 HandlerErrorCode
impl HandlerErrorCode
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 HandlerErrorCode
impl AsRef<str> for HandlerErrorCode
source§impl Clone for HandlerErrorCode
impl Clone for HandlerErrorCode
source§fn clone(&self) -> HandlerErrorCode
fn clone(&self) -> HandlerErrorCode
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HandlerErrorCode
impl Debug for HandlerErrorCode
source§impl Display for HandlerErrorCode
impl Display for HandlerErrorCode
source§impl From<&str> for HandlerErrorCode
impl From<&str> for HandlerErrorCode
source§impl FromStr for HandlerErrorCode
impl FromStr for HandlerErrorCode
source§impl Hash for HandlerErrorCode
impl Hash for HandlerErrorCode
source§impl Ord for HandlerErrorCode
impl Ord for HandlerErrorCode
source§fn cmp(&self, other: &HandlerErrorCode) -> Ordering
fn cmp(&self, other: &HandlerErrorCode) -> 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 HandlerErrorCode
impl PartialEq for HandlerErrorCode
source§fn eq(&self, other: &HandlerErrorCode) -> bool
fn eq(&self, other: &HandlerErrorCode) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for HandlerErrorCode
impl PartialOrd for HandlerErrorCode
source§fn partial_cmp(&self, other: &HandlerErrorCode) -> Option<Ordering>
fn partial_cmp(&self, other: &HandlerErrorCode) -> 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 HandlerErrorCode
impl StructuralPartialEq for HandlerErrorCode
Auto Trait Implementations§
impl Freeze for HandlerErrorCode
impl RefUnwindSafe for HandlerErrorCode
impl Send for HandlerErrorCode
impl Sync for HandlerErrorCode
impl Unpin for HandlerErrorCode
impl UnwindSafe for HandlerErrorCode
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