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