Enum aws_sdk_opsworks::types::Architecture
source · #[non_exhaustive]pub enum Architecture {
I386,
X8664,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Architecture
, 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 architecture = unimplemented!();
match architecture {
Architecture::I386 => { /* ... */ },
Architecture::X8664 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when architecture
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Architecture::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Architecture::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 Architecture::NewFeature
is defined.
Specifically, when architecture
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Architecture::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
I386
X8664
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 Architecture
impl Architecture
source§impl Architecture
impl Architecture
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 Architecture
impl AsRef<str> for Architecture
source§impl Clone for Architecture
impl Clone for Architecture
source§fn clone(&self) -> Architecture
fn clone(&self) -> Architecture
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for Architecture
impl Debug for Architecture
source§impl Display for Architecture
impl Display for Architecture
source§impl From<&str> for Architecture
impl From<&str> for Architecture
source§impl FromStr for Architecture
impl FromStr for Architecture
source§impl Hash for Architecture
impl Hash for Architecture
source§impl Ord for Architecture
impl Ord for Architecture
source§fn cmp(&self, other: &Architecture) -> Ordering
fn cmp(&self, other: &Architecture) -> 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 Architecture
impl PartialEq for Architecture
source§fn eq(&self, other: &Architecture) -> bool
fn eq(&self, other: &Architecture) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for Architecture
impl PartialOrd for Architecture
source§fn partial_cmp(&self, other: &Architecture) -> Option<Ordering>
fn partial_cmp(&self, other: &Architecture) -> 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 Architecture
impl StructuralPartialEq for Architecture
Auto Trait Implementations§
impl Freeze for Architecture
impl RefUnwindSafe for Architecture
impl Send for Architecture
impl Sync for Architecture
impl Unpin for Architecture
impl UnwindSafe for Architecture
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