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