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