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