#[non_exhaustive]pub enum DeviceProfileType {
LoRaWan,
Sidewalk,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DeviceProfileType
, 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 deviceprofiletype = unimplemented!();
match deviceprofiletype {
DeviceProfileType::LoRaWan => { /* ... */ },
DeviceProfileType::Sidewalk => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when deviceprofiletype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DeviceProfileType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DeviceProfileType::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 DeviceProfileType::NewFeature
is defined.
Specifically, when deviceprofiletype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DeviceProfileType::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
LoRaWan
Sidewalk
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 DeviceProfileType
impl DeviceProfileType
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 DeviceProfileType
impl AsRef<str> for DeviceProfileType
Source§impl Clone for DeviceProfileType
impl Clone for DeviceProfileType
Source§fn clone(&self) -> DeviceProfileType
fn clone(&self) -> DeviceProfileType
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for DeviceProfileType
impl Debug for DeviceProfileType
Source§impl Display for DeviceProfileType
impl Display for DeviceProfileType
Source§impl From<&str> for DeviceProfileType
impl From<&str> for DeviceProfileType
Source§impl FromStr for DeviceProfileType
impl FromStr for DeviceProfileType
Source§impl Hash for DeviceProfileType
impl Hash for DeviceProfileType
Source§impl Ord for DeviceProfileType
impl Ord for DeviceProfileType
Source§fn cmp(&self, other: &DeviceProfileType) -> Ordering
fn cmp(&self, other: &DeviceProfileType) -> 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 DeviceProfileType
impl PartialEq for DeviceProfileType
Source§impl PartialOrd for DeviceProfileType
impl PartialOrd for DeviceProfileType
impl Eq for DeviceProfileType
impl StructuralPartialEq for DeviceProfileType
Auto Trait Implementations§
impl Freeze for DeviceProfileType
impl RefUnwindSafe for DeviceProfileType
impl Send for DeviceProfileType
impl Sync for DeviceProfileType
impl Unpin for DeviceProfileType
impl UnwindSafe for DeviceProfileType
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