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