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