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