Enum aws_sdk_lightsail::types::HttpProtocolIpv6
source · #[non_exhaustive]pub enum HttpProtocolIpv6 {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against HttpProtocolIpv6
, 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 httpprotocolipv6 = unimplemented!();
match httpprotocolipv6 {
HttpProtocolIpv6::Disabled => { /* ... */ },
HttpProtocolIpv6::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when httpprotocolipv6
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant HttpProtocolIpv6::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
HttpProtocolIpv6::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 HttpProtocolIpv6::NewFeature
is defined.
Specifically, when httpprotocolipv6
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on HttpProtocolIpv6::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
Disabled
Enabled
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 HttpProtocolIpv6
impl HttpProtocolIpv6
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 HttpProtocolIpv6
impl AsRef<str> for HttpProtocolIpv6
source§impl Clone for HttpProtocolIpv6
impl Clone for HttpProtocolIpv6
source§fn clone(&self) -> HttpProtocolIpv6
fn clone(&self) -> HttpProtocolIpv6
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for HttpProtocolIpv6
impl Debug for HttpProtocolIpv6
source§impl Display for HttpProtocolIpv6
impl Display for HttpProtocolIpv6
source§impl From<&str> for HttpProtocolIpv6
impl From<&str> for HttpProtocolIpv6
source§impl FromStr for HttpProtocolIpv6
impl FromStr for HttpProtocolIpv6
source§impl Hash for HttpProtocolIpv6
impl Hash for HttpProtocolIpv6
source§impl Ord for HttpProtocolIpv6
impl Ord for HttpProtocolIpv6
source§fn cmp(&self, other: &HttpProtocolIpv6) -> Ordering
fn cmp(&self, other: &HttpProtocolIpv6) -> 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 HttpProtocolIpv6
impl PartialEq for HttpProtocolIpv6
source§fn eq(&self, other: &HttpProtocolIpv6) -> bool
fn eq(&self, other: &HttpProtocolIpv6) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for HttpProtocolIpv6
impl PartialOrd for HttpProtocolIpv6
source§fn partial_cmp(&self, other: &HttpProtocolIpv6) -> Option<Ordering>
fn partial_cmp(&self, other: &HttpProtocolIpv6) -> 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 HttpProtocolIpv6
impl StructuralPartialEq for HttpProtocolIpv6
Auto Trait Implementations§
impl Freeze for HttpProtocolIpv6
impl RefUnwindSafe for HttpProtocolIpv6
impl Send for HttpProtocolIpv6
impl Sync for HttpProtocolIpv6
impl Unpin for HttpProtocolIpv6
impl UnwindSafe for HttpProtocolIpv6
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