Enum FieldSource 

pub enum FieldSource {
    Absent,
    Slot {
        offset: u32,
        presence_byte: u32,
        presence_mask: u8,
        load: Load,
    },
    Packed {
        writer_pos: u32,
        load: Load,
    },
}

Variants

Absent

Field does not exist in the writer schema: reader sees None.

Slot

Field lives at a constant offset (fixed/dense writer struct).

Fields

offset: u32

Slot offset relative to the struct block base (writer layout).

presence_byte: u32

Presence bit position, relative to block base. A zero mask means the field is always present (dense writer struct: no bitmap).

presence_mask: u8

load: Load

Packed

Field lives in a packed writer struct: its presence bit and byte offset are recovered from the per-message bitmap via the writer’s crate::layout::PackedLayout (looked up by the plan’s writer_type).

Fields

writer_pos: u32

Field position (ID-sorted) in the writer struct.

load: Load

Trait Implementations

impl Clone for FieldSource

fn clone(&self) -> FieldSource

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FieldSource

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

Formats the value using the given formatter.