Enum aws_sdk_apptest::types::M2ManagedRuntime
source · #[non_exhaustive]pub enum M2ManagedRuntime {
Microfocus,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against M2ManagedRuntime
, 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 m2managedruntime = unimplemented!();
match m2managedruntime {
M2ManagedRuntime::Microfocus => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when m2managedruntime
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant M2ManagedRuntime::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
M2ManagedRuntime::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 M2ManagedRuntime::NewFeature
is defined.
Specifically, when m2managedruntime
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on M2ManagedRuntime::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
Microfocus
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 M2ManagedRuntime
impl M2ManagedRuntime
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 M2ManagedRuntime
impl AsRef<str> for M2ManagedRuntime
source§impl Clone for M2ManagedRuntime
impl Clone for M2ManagedRuntime
source§fn clone(&self) -> M2ManagedRuntime
fn clone(&self) -> M2ManagedRuntime
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for M2ManagedRuntime
impl Debug for M2ManagedRuntime
source§impl Display for M2ManagedRuntime
impl Display for M2ManagedRuntime
source§impl From<&str> for M2ManagedRuntime
impl From<&str> for M2ManagedRuntime
source§impl FromStr for M2ManagedRuntime
impl FromStr for M2ManagedRuntime
source§impl Hash for M2ManagedRuntime
impl Hash for M2ManagedRuntime
source§impl Ord for M2ManagedRuntime
impl Ord for M2ManagedRuntime
source§fn cmp(&self, other: &M2ManagedRuntime) -> Ordering
fn cmp(&self, other: &M2ManagedRuntime) -> 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 M2ManagedRuntime
impl PartialEq for M2ManagedRuntime
source§fn eq(&self, other: &M2ManagedRuntime) -> bool
fn eq(&self, other: &M2ManagedRuntime) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for M2ManagedRuntime
impl PartialOrd for M2ManagedRuntime
source§fn partial_cmp(&self, other: &M2ManagedRuntime) -> Option<Ordering>
fn partial_cmp(&self, other: &M2ManagedRuntime) -> 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 M2ManagedRuntime
impl StructuralPartialEq for M2ManagedRuntime
Auto Trait Implementations§
impl Freeze for M2ManagedRuntime
impl RefUnwindSafe for M2ManagedRuntime
impl Send for M2ManagedRuntime
impl Sync for M2ManagedRuntime
impl Unpin for M2ManagedRuntime
impl UnwindSafe for M2ManagedRuntime
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