#[non_exhaustive]pub enum TransformationToolName {
App2Container,
Mgn,
Dms,
Emp,
InPlaceOsUpgrade,
NativeSql,
PortingAssistant,
Sct,
StrategyRecommendationSupport,
Wwama,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against TransformationToolName
, 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 transformationtoolname = unimplemented!();
match transformationtoolname {
TransformationToolName::App2Container => { /* ... */ },
TransformationToolName::Mgn => { /* ... */ },
TransformationToolName::Dms => { /* ... */ },
TransformationToolName::Emp => { /* ... */ },
TransformationToolName::InPlaceOsUpgrade => { /* ... */ },
TransformationToolName::NativeSql => { /* ... */ },
TransformationToolName::PortingAssistant => { /* ... */ },
TransformationToolName::Sct => { /* ... */ },
TransformationToolName::StrategyRecommendationSupport => { /* ... */ },
TransformationToolName::Wwama => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when transformationtoolname
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant TransformationToolName::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
TransformationToolName::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 TransformationToolName::NewFeature
is defined.
Specifically, when transformationtoolname
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on TransformationToolName::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
App2Container
Mgn
Dms
Emp
InPlaceOsUpgrade
NativeSql
PortingAssistant
Sct
StrategyRecommendationSupport
Wwama
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 TransformationToolName
impl TransformationToolName
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 TransformationToolName
impl AsRef<str> for TransformationToolName
source§impl Clone for TransformationToolName
impl Clone for TransformationToolName
source§fn clone(&self) -> TransformationToolName
fn clone(&self) -> TransformationToolName
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for TransformationToolName
impl Debug for TransformationToolName
source§impl Display for TransformationToolName
impl Display for TransformationToolName
source§impl From<&str> for TransformationToolName
impl From<&str> for TransformationToolName
source§impl FromStr for TransformationToolName
impl FromStr for TransformationToolName
source§impl Hash for TransformationToolName
impl Hash for TransformationToolName
source§impl Ord for TransformationToolName
impl Ord for TransformationToolName
source§fn cmp(&self, other: &TransformationToolName) -> Ordering
fn cmp(&self, other: &TransformationToolName) -> 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 TransformationToolName
impl PartialEq for TransformationToolName
source§fn eq(&self, other: &TransformationToolName) -> bool
fn eq(&self, other: &TransformationToolName) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for TransformationToolName
impl PartialOrd for TransformationToolName
source§fn partial_cmp(&self, other: &TransformationToolName) -> Option<Ordering>
fn partial_cmp(&self, other: &TransformationToolName) -> 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 TransformationToolName
impl StructuralPartialEq for TransformationToolName
Auto Trait Implementations§
impl Freeze for TransformationToolName
impl RefUnwindSafe for TransformationToolName
impl Send for TransformationToolName
impl Sync for TransformationToolName
impl Unpin for TransformationToolName
impl UnwindSafe for TransformationToolName
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