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