Enum aws_sdk_lightsail::types::RegionName
source · #[non_exhaustive]pub enum RegionName {
Show 16 variants
ApNortheast1,
ApNortheast2,
ApSouth1,
ApSoutheast1,
ApSoutheast2,
CaCentral1,
EuCentral1,
EuNorth1,
EuWest1,
EuWest2,
EuWest3,
UsEast1,
UsEast2,
UsWest1,
UsWest2,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against RegionName
, 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 regionname = unimplemented!();
match regionname {
RegionName::ApNortheast1 => { /* ... */ },
RegionName::ApNortheast2 => { /* ... */ },
RegionName::ApSouth1 => { /* ... */ },
RegionName::ApSoutheast1 => { /* ... */ },
RegionName::ApSoutheast2 => { /* ... */ },
RegionName::CaCentral1 => { /* ... */ },
RegionName::EuCentral1 => { /* ... */ },
RegionName::EuNorth1 => { /* ... */ },
RegionName::EuWest1 => { /* ... */ },
RegionName::EuWest2 => { /* ... */ },
RegionName::EuWest3 => { /* ... */ },
RegionName::UsEast1 => { /* ... */ },
RegionName::UsEast2 => { /* ... */ },
RegionName::UsWest1 => { /* ... */ },
RegionName::UsWest2 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when regionname
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant RegionName::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
RegionName::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 RegionName::NewFeature
is defined.
Specifically, when regionname
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on RegionName::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
ApNortheast1
ApNortheast2
ApSouth1
ApSoutheast1
ApSoutheast2
CaCentral1
EuCentral1
EuNorth1
EuWest1
EuWest2
EuWest3
UsEast1
UsEast2
UsWest1
UsWest2
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 RegionName
impl RegionName
source§impl RegionName
impl RegionName
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 RegionName
impl AsRef<str> for RegionName
source§impl Clone for RegionName
impl Clone for RegionName
source§fn clone(&self) -> RegionName
fn clone(&self) -> RegionName
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for RegionName
impl Debug for RegionName
source§impl Display for RegionName
impl Display for RegionName
source§impl From<&str> for RegionName
impl From<&str> for RegionName
source§impl FromStr for RegionName
impl FromStr for RegionName
source§impl Hash for RegionName
impl Hash for RegionName
source§impl Ord for RegionName
impl Ord for RegionName
source§fn cmp(&self, other: &RegionName) -> Ordering
fn cmp(&self, other: &RegionName) -> 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 RegionName
impl PartialEq for RegionName
source§fn eq(&self, other: &RegionName) -> bool
fn eq(&self, other: &RegionName) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for RegionName
impl PartialOrd for RegionName
source§fn partial_cmp(&self, other: &RegionName) -> Option<Ordering>
fn partial_cmp(&self, other: &RegionName) -> 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 RegionName
impl StructuralPartialEq for RegionName
Auto Trait Implementations§
impl Freeze for RegionName
impl RefUnwindSafe for RegionName
impl Send for RegionName
impl Sync for RegionName
impl Unpin for RegionName
impl UnwindSafe for RegionName
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