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