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