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