#[non_exhaustive]pub enum TranscribeMedicalRegion {
ApSoutheast2,
Auto,
CaCentral1,
EuWest1,
UsEast1,
UsEast2,
UsWest2,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against TranscribeMedicalRegion
, 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 transcribemedicalregion = unimplemented!();
match transcribemedicalregion {
TranscribeMedicalRegion::ApSoutheast2 => { /* ... */ },
TranscribeMedicalRegion::Auto => { /* ... */ },
TranscribeMedicalRegion::CaCentral1 => { /* ... */ },
TranscribeMedicalRegion::EuWest1 => { /* ... */ },
TranscribeMedicalRegion::UsEast1 => { /* ... */ },
TranscribeMedicalRegion::UsEast2 => { /* ... */ },
TranscribeMedicalRegion::UsWest2 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when transcribemedicalregion
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant TranscribeMedicalRegion::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
TranscribeMedicalRegion::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 TranscribeMedicalRegion::NewFeature
is defined.
Specifically, when transcribemedicalregion
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on TranscribeMedicalRegion::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
ApSoutheast2
Auto
CaCentral1
EuWest1
UsEast1
UsEast2
UsWest2
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 TranscribeMedicalRegion
impl TranscribeMedicalRegion
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 TranscribeMedicalRegion
impl AsRef<str> for TranscribeMedicalRegion
source§impl Clone for TranscribeMedicalRegion
impl Clone for TranscribeMedicalRegion
source§fn clone(&self) -> TranscribeMedicalRegion
fn clone(&self) -> TranscribeMedicalRegion
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for TranscribeMedicalRegion
impl Debug for TranscribeMedicalRegion
source§impl Display for TranscribeMedicalRegion
impl Display for TranscribeMedicalRegion
source§impl From<&str> for TranscribeMedicalRegion
impl From<&str> for TranscribeMedicalRegion
source§impl FromStr for TranscribeMedicalRegion
impl FromStr for TranscribeMedicalRegion
source§impl Hash for TranscribeMedicalRegion
impl Hash for TranscribeMedicalRegion
source§impl Ord for TranscribeMedicalRegion
impl Ord for TranscribeMedicalRegion
source§fn cmp(&self, other: &TranscribeMedicalRegion) -> Ordering
fn cmp(&self, other: &TranscribeMedicalRegion) -> 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 TranscribeMedicalRegion
impl PartialEq for TranscribeMedicalRegion
source§fn eq(&self, other: &TranscribeMedicalRegion) -> bool
fn eq(&self, other: &TranscribeMedicalRegion) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for TranscribeMedicalRegion
impl PartialOrd for TranscribeMedicalRegion
source§fn partial_cmp(&self, other: &TranscribeMedicalRegion) -> Option<Ordering>
fn partial_cmp(&self, other: &TranscribeMedicalRegion) -> 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 TranscribeMedicalRegion
impl StructuralPartialEq for TranscribeMedicalRegion
Auto Trait Implementations§
impl Freeze for TranscribeMedicalRegion
impl RefUnwindSafe for TranscribeMedicalRegion
impl Send for TranscribeMedicalRegion
impl Sync for TranscribeMedicalRegion
impl Unpin for TranscribeMedicalRegion
impl UnwindSafe for TranscribeMedicalRegion
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.