Enum aws_sdk_fsx::types::LustreDeploymentType
source · #[non_exhaustive]pub enum LustreDeploymentType {
Persistent1,
Persistent2,
Scratch1,
Scratch2,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against LustreDeploymentType
, 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 lustredeploymenttype = unimplemented!();
match lustredeploymenttype {
LustreDeploymentType::Persistent1 => { /* ... */ },
LustreDeploymentType::Persistent2 => { /* ... */ },
LustreDeploymentType::Scratch1 => { /* ... */ },
LustreDeploymentType::Scratch2 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when lustredeploymenttype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant LustreDeploymentType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
LustreDeploymentType::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 LustreDeploymentType::NewFeature
is defined.
Specifically, when lustredeploymenttype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on LustreDeploymentType::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
Persistent1
Persistent2
Scratch1
Scratch2
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 LustreDeploymentType
impl LustreDeploymentType
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 LustreDeploymentType
impl AsRef<str> for LustreDeploymentType
source§impl Clone for LustreDeploymentType
impl Clone for LustreDeploymentType
source§fn clone(&self) -> LustreDeploymentType
fn clone(&self) -> LustreDeploymentType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for LustreDeploymentType
impl Debug for LustreDeploymentType
source§impl Display for LustreDeploymentType
impl Display for LustreDeploymentType
source§impl From<&str> for LustreDeploymentType
impl From<&str> for LustreDeploymentType
source§impl FromStr for LustreDeploymentType
impl FromStr for LustreDeploymentType
source§impl Hash for LustreDeploymentType
impl Hash for LustreDeploymentType
source§impl Ord for LustreDeploymentType
impl Ord for LustreDeploymentType
source§fn cmp(&self, other: &LustreDeploymentType) -> Ordering
fn cmp(&self, other: &LustreDeploymentType) -> 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 LustreDeploymentType
impl PartialEq for LustreDeploymentType
source§fn eq(&self, other: &LustreDeploymentType) -> bool
fn eq(&self, other: &LustreDeploymentType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for LustreDeploymentType
impl PartialOrd for LustreDeploymentType
source§fn partial_cmp(&self, other: &LustreDeploymentType) -> Option<Ordering>
fn partial_cmp(&self, other: &LustreDeploymentType) -> 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 LustreDeploymentType
impl StructuralPartialEq for LustreDeploymentType
Auto Trait Implementations§
impl Freeze for LustreDeploymentType
impl RefUnwindSafe for LustreDeploymentType
impl Send for LustreDeploymentType
impl Sync for LustreDeploymentType
impl Unpin for LustreDeploymentType
impl UnwindSafe for LustreDeploymentType
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.