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