Struct fdb_rl::raw_record::scan_state_machine::RawRecordReverseScanStateMachine

pub(super) struct RawRecordReverseScanStateMachine {
    state_machine_state: RawRecordReverseScanStateMachineState,
    state_machine_data: Option<RawRecordReverseScanStateMachineStateData>,
}

A state machine that implements reverse scan and returns values of of type RawRecord.

See sismic/raw_record_reverse_scan.yaml for the design of the state machine.

Fields

state_machine_state: RawRecordReverseScanStateMachineState

state_machine_data: Option<RawRecordReverseScanStateMachineStateData>

Implementations

impl RawRecordReverseScanStateMachine

pub(super) async fn next( &mut self, key_value_cursor: &mut KeyValueCursor, primary_key_schema: &RawRecordPrimaryKeySchema, values_limit: usize ) -> Option<CursorResult<RawRecord>>

If needed, perform the action (side effect) and state transition. Return an Option value or None in case we need to further drive the loop.

fn step_once_with_event(&mut self, event: RawRecordReverseScanStateMachineEvent)

Trait Implementations

impl Debug for RawRecordReverseScanStateMachine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.