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