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