#[non_exhaustive]pub enum OperatingSystemName {
AmazonLinux2,
Ubuntu1804,
Ubuntu2004,
Ubuntu2204,
UnknownValue,
Windows10,
Windows11,
Windows7,
WindowsServer2016,
WindowsServer2019,
WindowsServer2022,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against OperatingSystemName
, 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 operatingsystemname = unimplemented!();
match operatingsystemname {
OperatingSystemName::AmazonLinux2 => { /* ... */ },
OperatingSystemName::Ubuntu1804 => { /* ... */ },
OperatingSystemName::Ubuntu2004 => { /* ... */ },
OperatingSystemName::Ubuntu2204 => { /* ... */ },
OperatingSystemName::UnknownValue => { /* ... */ },
OperatingSystemName::Windows10 => { /* ... */ },
OperatingSystemName::Windows11 => { /* ... */ },
OperatingSystemName::Windows7 => { /* ... */ },
OperatingSystemName::WindowsServer2016 => { /* ... */ },
OperatingSystemName::WindowsServer2019 => { /* ... */ },
OperatingSystemName::WindowsServer2022 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when operatingsystemname
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant OperatingSystemName::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
OperatingSystemName::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 OperatingSystemName::NewFeature
is defined.
Specifically, when operatingsystemname
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on OperatingSystemName::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.
Note:
OperatingSystemName::Unknown
has been renamed to::UnknownValue
.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
AmazonLinux2
Ubuntu1804
Ubuntu2004
Ubuntu2204
UnknownValue
Note: ::Unknown
has been renamed to ::UnknownValue
.
Windows10
Windows11
Windows7
WindowsServer2016
WindowsServer2019
WindowsServer2022
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 OperatingSystemName
impl OperatingSystemName
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 OperatingSystemName
impl AsRef<str> for OperatingSystemName
source§impl Clone for OperatingSystemName
impl Clone for OperatingSystemName
source§fn clone(&self) -> OperatingSystemName
fn clone(&self) -> OperatingSystemName
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for OperatingSystemName
impl Debug for OperatingSystemName
source§impl Display for OperatingSystemName
impl Display for OperatingSystemName
source§impl From<&str> for OperatingSystemName
impl From<&str> for OperatingSystemName
source§impl FromStr for OperatingSystemName
impl FromStr for OperatingSystemName
source§impl Hash for OperatingSystemName
impl Hash for OperatingSystemName
source§impl Ord for OperatingSystemName
impl Ord for OperatingSystemName
source§fn cmp(&self, other: &OperatingSystemName) -> Ordering
fn cmp(&self, other: &OperatingSystemName) -> 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 OperatingSystemName
impl PartialEq for OperatingSystemName
source§fn eq(&self, other: &OperatingSystemName) -> bool
fn eq(&self, other: &OperatingSystemName) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for OperatingSystemName
impl PartialOrd for OperatingSystemName
source§fn partial_cmp(&self, other: &OperatingSystemName) -> Option<Ordering>
fn partial_cmp(&self, other: &OperatingSystemName) -> 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 OperatingSystemName
impl StructuralPartialEq for OperatingSystemName
Auto Trait Implementations§
impl Freeze for OperatingSystemName
impl RefUnwindSafe for OperatingSystemName
impl Send for OperatingSystemName
impl Sync for OperatingSystemName
impl Unpin for OperatingSystemName
impl UnwindSafe for OperatingSystemName
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