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