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