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