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