Function err_code

tests/rust/src/helpers.rs:21–26

Extract the DynamoDB error code from an `SdkError`. Uses `ProvideErrorMetadata::code()` to get the error code string (e.g., "ResourceNotFoundException", "ConditionalCheckFailedException"). Returns `None` for non-service errors (dispatch failures, timeouts, etc.).

(err: &aws_smithy_runtime_api::client::result::SdkError<E, R>)

/// (e.g., "ResourceNotFoundException", "ConditionalCheckFailedException").
/// Returns `None` for non-service errors (dispatch failures, timeouts, etc.).
pub fn err_code<E, R>(err: &aws_smithy_runtime_api::client::result::SdkError<E, R>) -> Option<&str>
where
    E: ProvideErrorMetadata,
{
    ProvideErrorMetadata::code(err)
}

// ========== AttributeValue constructors ==========