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