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