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