#[non_exhaustive]
pub enum AllowsUnencryptedObjectUploads {
False,
True,
UnknownValue,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against AllowsUnencryptedObjectUploads
, 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 allowsunencryptedobjectuploads = unimplemented!();
match allowsunencryptedobjectuploads {
AllowsUnencryptedObjectUploads::False => { /* ... */ },
AllowsUnencryptedObjectUploads::True => { /* ... */ },
AllowsUnencryptedObjectUploads::UnknownValue => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when allowsunencryptedobjectuploads
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant AllowsUnencryptedObjectUploads::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
AllowsUnencryptedObjectUploads::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 AllowsUnencryptedObjectUploads::NewFeature
is defined.
Specifically, when allowsunencryptedobjectuploads
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on AllowsUnencryptedObjectUploads::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.
Note:
AllowsUnencryptedObjectUploads::Unknown
has been renamed to::UnknownValue
.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
False
True
UnknownValue
Note: ::Unknown
has been renamed to ::UnknownValue
.
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for AllowsUnencryptedObjectUploads
impl AsRef<str> for AllowsUnencryptedObjectUploads
source§impl Clone for AllowsUnencryptedObjectUploads
impl Clone for AllowsUnencryptedObjectUploads
source§fn clone(&self) -> AllowsUnencryptedObjectUploads
fn clone(&self) -> AllowsUnencryptedObjectUploads
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for AllowsUnencryptedObjectUploads
impl From<&str> for AllowsUnencryptedObjectUploads
source§impl Ord for AllowsUnencryptedObjectUploads
impl Ord for AllowsUnencryptedObjectUploads
source§fn cmp(&self, other: &AllowsUnencryptedObjectUploads) -> Ordering
fn cmp(&self, other: &AllowsUnencryptedObjectUploads) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<AllowsUnencryptedObjectUploads> for AllowsUnencryptedObjectUploads
impl PartialEq<AllowsUnencryptedObjectUploads> for AllowsUnencryptedObjectUploads
source§fn eq(&self, other: &AllowsUnencryptedObjectUploads) -> bool
fn eq(&self, other: &AllowsUnencryptedObjectUploads) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<AllowsUnencryptedObjectUploads> for AllowsUnencryptedObjectUploads
impl PartialOrd<AllowsUnencryptedObjectUploads> for AllowsUnencryptedObjectUploads
source§fn partial_cmp(
&self,
other: &AllowsUnencryptedObjectUploads
) -> Option<Ordering>
fn partial_cmp( &self, other: &AllowsUnencryptedObjectUploads ) -> 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 AllowsUnencryptedObjectUploads
impl StructuralEq for AllowsUnencryptedObjectUploads
impl StructuralPartialEq for AllowsUnencryptedObjectUploads
Auto Trait Implementations§
impl RefUnwindSafe for AllowsUnencryptedObjectUploads
impl Send for AllowsUnencryptedObjectUploads
impl Sync for AllowsUnencryptedObjectUploads
impl Unpin for AllowsUnencryptedObjectUploads
impl UnwindSafe for AllowsUnencryptedObjectUploads
Blanket Implementations§
source§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,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.