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