Enum aws_sdk_sesv2::types::ContactLanguage
source · #[non_exhaustive]pub enum ContactLanguage {
En,
Ja,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ContactLanguage
, 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 contactlanguage = unimplemented!();
match contactlanguage {
ContactLanguage::En => { /* ... */ },
ContactLanguage::Ja => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when contactlanguage
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ContactLanguage::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ContactLanguage::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 ContactLanguage::NewFeature
is defined.
Specifically, when contactlanguage
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ContactLanguage::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
En
Ja
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 ContactLanguage
impl ContactLanguage
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 ContactLanguage
impl AsRef<str> for ContactLanguage
source§impl Clone for ContactLanguage
impl Clone for ContactLanguage
source§fn clone(&self) -> ContactLanguage
fn clone(&self) -> ContactLanguage
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ContactLanguage
impl Debug for ContactLanguage
source§impl Display for ContactLanguage
impl Display for ContactLanguage
source§impl From<&str> for ContactLanguage
impl From<&str> for ContactLanguage
source§impl FromStr for ContactLanguage
impl FromStr for ContactLanguage
source§impl Hash for ContactLanguage
impl Hash for ContactLanguage
source§impl Ord for ContactLanguage
impl Ord for ContactLanguage
source§fn cmp(&self, other: &ContactLanguage) -> Ordering
fn cmp(&self, other: &ContactLanguage) -> 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 ContactLanguage
impl PartialEq for ContactLanguage
source§fn eq(&self, other: &ContactLanguage) -> bool
fn eq(&self, other: &ContactLanguage) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ContactLanguage
impl PartialOrd for ContactLanguage
source§fn partial_cmp(&self, other: &ContactLanguage) -> Option<Ordering>
fn partial_cmp(&self, other: &ContactLanguage) -> 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 ContactLanguage
impl StructuralPartialEq for ContactLanguage
Auto Trait Implementations§
impl Freeze for ContactLanguage
impl RefUnwindSafe for ContactLanguage
impl Send for ContactLanguage
impl Sync for ContactLanguage
impl Unpin for ContactLanguage
impl UnwindSafe for ContactLanguage
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