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