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