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