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