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