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