Enum aws_sdk_sagemaker::model::Processor
source · #[non_exhaustive]
pub enum Processor {
Cpu,
Gpu,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Processor
, 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 processor = unimplemented!();
match processor {
Processor::Cpu => { /* ... */ },
Processor::Gpu => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when processor
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Processor::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Processor::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 Processor::NewFeature
is defined.
Specifically, when processor
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Processor::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
Cpu
Gpu
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
Trait Implementations§
source§impl Ord for Processor
impl Ord for Processor
source§impl PartialEq<Processor> for Processor
impl PartialEq<Processor> for Processor
source§impl PartialOrd<Processor> for Processor
impl PartialOrd<Processor> for Processor
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 Processor
impl StructuralEq for Processor
impl StructuralPartialEq for Processor
Auto Trait Implementations§
impl RefUnwindSafe for Processor
impl Send for Processor
impl Sync for Processor
impl Unpin for Processor
impl UnwindSafe for Processor
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.