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