#[non_exhaustive]pub enum WriteOperationType {
Delete,
Insert,
Update,
Upsert,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against WriteOperationType
, 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 writeoperationtype = unimplemented!();
match writeoperationtype {
WriteOperationType::Delete => { /* ... */ },
WriteOperationType::Insert => { /* ... */ },
WriteOperationType::Update => { /* ... */ },
WriteOperationType::Upsert => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when writeoperationtype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant WriteOperationType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
WriteOperationType::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 WriteOperationType::NewFeature
is defined.
Specifically, when writeoperationtype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on WriteOperationType::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.
The possible write operations in the destination connector. When this value is not
provided, this defaults to the INSERT
operation.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Delete
Insert
Update
Upsert
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 WriteOperationType
impl WriteOperationType
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 WriteOperationType
impl AsRef<str> for WriteOperationType
Source§impl Clone for WriteOperationType
impl Clone for WriteOperationType
Source§fn clone(&self) -> WriteOperationType
fn clone(&self) -> WriteOperationType
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for WriteOperationType
impl Debug for WriteOperationType
Source§impl Display for WriteOperationType
impl Display for WriteOperationType
Source§impl From<&str> for WriteOperationType
impl From<&str> for WriteOperationType
Source§impl FromStr for WriteOperationType
impl FromStr for WriteOperationType
Source§impl Hash for WriteOperationType
impl Hash for WriteOperationType
Source§impl Ord for WriteOperationType
impl Ord for WriteOperationType
Source§fn cmp(&self, other: &WriteOperationType) -> Ordering
fn cmp(&self, other: &WriteOperationType) -> 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 WriteOperationType
impl PartialEq for WriteOperationType
Source§impl PartialOrd for WriteOperationType
impl PartialOrd for WriteOperationType
impl Eq for WriteOperationType
impl StructuralPartialEq for WriteOperationType
Auto Trait Implementations§
impl Freeze for WriteOperationType
impl RefUnwindSafe for WriteOperationType
impl Send for WriteOperationType
impl Sync for WriteOperationType
impl Unpin for WriteOperationType
impl UnwindSafe for WriteOperationType
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