Enum aws_sdk_sagemaker::model::TargetPlatformOs
source · #[non_exhaustive]
pub enum TargetPlatformOs {
Android,
Linux,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against TargetPlatformOs
, 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 targetplatformos = unimplemented!();
match targetplatformos {
TargetPlatformOs::Android => { /* ... */ },
TargetPlatformOs::Linux => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when targetplatformos
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant TargetPlatformOs::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
TargetPlatformOs::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 TargetPlatformOs::NewFeature
is defined.
Specifically, when targetplatformos
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on TargetPlatformOs::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
Android
Linux
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl AsRef<str> for TargetPlatformOs
impl AsRef<str> for TargetPlatformOs
source§impl Clone for TargetPlatformOs
impl Clone for TargetPlatformOs
source§fn clone(&self) -> TargetPlatformOs
fn clone(&self) -> TargetPlatformOs
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for TargetPlatformOs
impl Debug for TargetPlatformOs
source§impl From<&str> for TargetPlatformOs
impl From<&str> for TargetPlatformOs
source§impl FromStr for TargetPlatformOs
impl FromStr for TargetPlatformOs
source§impl Hash for TargetPlatformOs
impl Hash for TargetPlatformOs
source§impl Ord for TargetPlatformOs
impl Ord for TargetPlatformOs
source§fn cmp(&self, other: &TargetPlatformOs) -> Ordering
fn cmp(&self, other: &TargetPlatformOs) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<TargetPlatformOs> for TargetPlatformOs
impl PartialEq<TargetPlatformOs> for TargetPlatformOs
source§fn eq(&self, other: &TargetPlatformOs) -> bool
fn eq(&self, other: &TargetPlatformOs) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<TargetPlatformOs> for TargetPlatformOs
impl PartialOrd<TargetPlatformOs> for TargetPlatformOs
source§fn partial_cmp(&self, other: &TargetPlatformOs) -> Option<Ordering>
fn partial_cmp(&self, other: &TargetPlatformOs) -> 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 TargetPlatformOs
impl StructuralEq for TargetPlatformOs
impl StructuralPartialEq for TargetPlatformOs
Auto Trait Implementations§
impl RefUnwindSafe for TargetPlatformOs
impl Send for TargetPlatformOs
impl Sync for TargetPlatformOs
impl Unpin for TargetPlatformOs
impl UnwindSafe for TargetPlatformOs
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.