Enum aws_sdk_outposts::types::PowerDrawKva
source · #[non_exhaustive]pub enum PowerDrawKva {
Power10Kva,
Power15Kva,
Power30Kva,
Power5Kva,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against PowerDrawKva
, 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 powerdrawkva = unimplemented!();
match powerdrawkva {
PowerDrawKva::Power10Kva => { /* ... */ },
PowerDrawKva::Power15Kva => { /* ... */ },
PowerDrawKva::Power30Kva => { /* ... */ },
PowerDrawKva::Power5Kva => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when powerdrawkva
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant PowerDrawKva::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
PowerDrawKva::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 PowerDrawKva::NewFeature
is defined.
Specifically, when powerdrawkva
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on PowerDrawKva::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
Power10Kva
Power15Kva
Power30Kva
Power5Kva
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for PowerDrawKva
impl AsRef<str> for PowerDrawKva
source§impl Clone for PowerDrawKva
impl Clone for PowerDrawKva
source§fn clone(&self) -> PowerDrawKva
fn clone(&self) -> PowerDrawKva
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for PowerDrawKva
impl Debug for PowerDrawKva
source§impl From<&str> for PowerDrawKva
impl From<&str> for PowerDrawKva
source§impl FromStr for PowerDrawKva
impl FromStr for PowerDrawKva
source§impl Hash for PowerDrawKva
impl Hash for PowerDrawKva
source§impl Ord for PowerDrawKva
impl Ord for PowerDrawKva
source§fn cmp(&self, other: &PowerDrawKva) -> Ordering
fn cmp(&self, other: &PowerDrawKva) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<PowerDrawKva> for PowerDrawKva
impl PartialEq<PowerDrawKva> for PowerDrawKva
source§fn eq(&self, other: &PowerDrawKva) -> bool
fn eq(&self, other: &PowerDrawKva) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<PowerDrawKva> for PowerDrawKva
impl PartialOrd<PowerDrawKva> for PowerDrawKva
source§fn partial_cmp(&self, other: &PowerDrawKva) -> Option<Ordering>
fn partial_cmp(&self, other: &PowerDrawKva) -> 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 PowerDrawKva
impl StructuralEq for PowerDrawKva
impl StructuralPartialEq for PowerDrawKva
Auto Trait Implementations§
impl RefUnwindSafe for PowerDrawKva
impl Send for PowerDrawKva
impl Sync for PowerDrawKva
impl Unpin for PowerDrawKva
impl UnwindSafe for PowerDrawKva
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> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.