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