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