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