Enum aws_sdk_fsx::types::DataCompressionType
source · #[non_exhaustive]pub enum DataCompressionType {
Lz4,
None,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DataCompressionType
, 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 datacompressiontype = unimplemented!();
match datacompressiontype {
DataCompressionType::Lz4 => { /* ... */ },
DataCompressionType::None => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when datacompressiontype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DataCompressionType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DataCompressionType::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 DataCompressionType::NewFeature
is defined.
Specifically, when datacompressiontype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DataCompressionType::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
Lz4
None
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 DataCompressionType
impl DataCompressionType
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 DataCompressionType
impl AsRef<str> for DataCompressionType
source§impl Clone for DataCompressionType
impl Clone for DataCompressionType
source§fn clone(&self) -> DataCompressionType
fn clone(&self) -> DataCompressionType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DataCompressionType
impl Debug for DataCompressionType
source§impl Display for DataCompressionType
impl Display for DataCompressionType
source§impl From<&str> for DataCompressionType
impl From<&str> for DataCompressionType
source§impl FromStr for DataCompressionType
impl FromStr for DataCompressionType
source§impl Hash for DataCompressionType
impl Hash for DataCompressionType
source§impl Ord for DataCompressionType
impl Ord for DataCompressionType
source§fn cmp(&self, other: &DataCompressionType) -> Ordering
fn cmp(&self, other: &DataCompressionType) -> 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 DataCompressionType
impl PartialEq for DataCompressionType
source§fn eq(&self, other: &DataCompressionType) -> bool
fn eq(&self, other: &DataCompressionType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DataCompressionType
impl PartialOrd for DataCompressionType
source§fn partial_cmp(&self, other: &DataCompressionType) -> Option<Ordering>
fn partial_cmp(&self, other: &DataCompressionType) -> 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 DataCompressionType
impl StructuralPartialEq for DataCompressionType
Auto Trait Implementations§
impl Freeze for DataCompressionType
impl RefUnwindSafe for DataCompressionType
impl Send for DataCompressionType
impl Sync for DataCompressionType
impl Unpin for DataCompressionType
impl UnwindSafe for DataCompressionType
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.