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