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