#[non_exhaustive]pub enum ShippingLabelStatus {
Failed,
InProgress,
Succeeded,
TimedOut,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ShippingLabelStatus
, 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 shippinglabelstatus = unimplemented!();
match shippinglabelstatus {
ShippingLabelStatus::Failed => { /* ... */ },
ShippingLabelStatus::InProgress => { /* ... */ },
ShippingLabelStatus::Succeeded => { /* ... */ },
ShippingLabelStatus::TimedOut => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when shippinglabelstatus
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ShippingLabelStatus::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ShippingLabelStatus::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 ShippingLabelStatus::NewFeature
is defined.
Specifically, when shippinglabelstatus
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ShippingLabelStatus::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
Failed
InProgress
Succeeded
TimedOut
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 ShippingLabelStatus
impl ShippingLabelStatus
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 ShippingLabelStatus
impl AsRef<str> for ShippingLabelStatus
source§impl Clone for ShippingLabelStatus
impl Clone for ShippingLabelStatus
source§fn clone(&self) -> ShippingLabelStatus
fn clone(&self) -> ShippingLabelStatus
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ShippingLabelStatus
impl Debug for ShippingLabelStatus
source§impl Display for ShippingLabelStatus
impl Display for ShippingLabelStatus
source§impl From<&str> for ShippingLabelStatus
impl From<&str> for ShippingLabelStatus
source§impl FromStr for ShippingLabelStatus
impl FromStr for ShippingLabelStatus
source§impl Hash for ShippingLabelStatus
impl Hash for ShippingLabelStatus
source§impl Ord for ShippingLabelStatus
impl Ord for ShippingLabelStatus
source§fn cmp(&self, other: &ShippingLabelStatus) -> Ordering
fn cmp(&self, other: &ShippingLabelStatus) -> 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 ShippingLabelStatus
impl PartialEq for ShippingLabelStatus
source§fn eq(&self, other: &ShippingLabelStatus) -> bool
fn eq(&self, other: &ShippingLabelStatus) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ShippingLabelStatus
impl PartialOrd for ShippingLabelStatus
source§fn partial_cmp(&self, other: &ShippingLabelStatus) -> Option<Ordering>
fn partial_cmp(&self, other: &ShippingLabelStatus) -> 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 ShippingLabelStatus
impl StructuralPartialEq for ShippingLabelStatus
Auto Trait Implementations§
impl Freeze for ShippingLabelStatus
impl RefUnwindSafe for ShippingLabelStatus
impl Send for ShippingLabelStatus
impl Sync for ShippingLabelStatus
impl Unpin for ShippingLabelStatus
impl UnwindSafe for ShippingLabelStatus
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
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more