Enum aws_sdk_dynamodb::model::ExportFormat
source · #[non_exhaustive]
pub enum ExportFormat {
DynamodbJson,
Ion,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ExportFormat
, 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 exportformat = unimplemented!();
match exportformat {
ExportFormat::DynamodbJson => { /* ... */ },
ExportFormat::Ion => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when exportformat
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ExportFormat::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ExportFormat::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 ExportFormat::NewFeature
is defined.
Specifically, when exportformat
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ExportFormat::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
DynamodbJson
Ion
Unknown(UnknownVariantValue)
Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl ExportFormat
impl ExportFormat
sourcepub fn as_str(&self) -> &str
pub fn as_str(&self) -> &str
Returns the &str
value of the enum member.
Examples found in repository?
More examples
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pub fn serialize_structure_crate_input_export_table_to_point_in_time_input(
object: &mut aws_smithy_json::serialize::JsonObjectWriter,
input: &crate::input::ExportTableToPointInTimeInput,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
if let Some(var_115) = &input.table_arn {
object.key("TableArn").string(var_115.as_str());
}
if let Some(var_116) = &input.export_time {
object
.key("ExportTime")
.date_time(var_116, aws_smithy_types::date_time::Format::EpochSeconds)?;
}
if let Some(var_117) = &input.client_token {
object.key("ClientToken").string(var_117.as_str());
}
if let Some(var_118) = &input.s3_bucket {
object.key("S3Bucket").string(var_118.as_str());
}
if let Some(var_119) = &input.s3_bucket_owner {
object.key("S3BucketOwner").string(var_119.as_str());
}
if let Some(var_120) = &input.s3_prefix {
object.key("S3Prefix").string(var_120.as_str());
}
if let Some(var_121) = &input.s3_sse_algorithm {
object.key("S3SseAlgorithm").string(var_121.as_str());
}
if let Some(var_122) = &input.s3_sse_kms_key_id {
object.key("S3SseKmsKeyId").string(var_122.as_str());
}
if let Some(var_123) = &input.export_format {
object.key("ExportFormat").string(var_123.as_str());
}
Ok(())
}
Trait Implementations§
source§impl AsRef<str> for ExportFormat
impl AsRef<str> for ExportFormat
source§impl Clone for ExportFormat
impl Clone for ExportFormat
source§fn clone(&self) -> ExportFormat
fn clone(&self) -> ExportFormat
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ExportFormat
impl Debug for ExportFormat
source§impl From<&str> for ExportFormat
impl From<&str> for ExportFormat
source§impl FromStr for ExportFormat
impl FromStr for ExportFormat
source§impl Hash for ExportFormat
impl Hash for ExportFormat
source§impl Ord for ExportFormat
impl Ord for ExportFormat
source§fn cmp(&self, other: &ExportFormat) -> Ordering
fn cmp(&self, other: &ExportFormat) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq<ExportFormat> for ExportFormat
impl PartialEq<ExportFormat> for ExportFormat
source§fn eq(&self, other: &ExportFormat) -> bool
fn eq(&self, other: &ExportFormat) -> bool
source§impl PartialOrd<ExportFormat> for ExportFormat
impl PartialOrd<ExportFormat> for ExportFormat
source§fn partial_cmp(&self, other: &ExportFormat) -> Option<Ordering>
fn partial_cmp(&self, other: &ExportFormat) -> 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 ExportFormat
impl StructuralEq for ExportFormat
impl StructuralPartialEq for ExportFormat
Auto Trait Implementations§
impl RefUnwindSafe for ExportFormat
impl Send for ExportFormat
impl Sync for ExportFormat
impl Unpin for ExportFormat
impl UnwindSafe for ExportFormat
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.