Struct OffsetRowMapper 

pub struct OffsetRowMapper {
    pub offset: i32,
}

D.4.a: an offset-row stub mapper used by the unit tests to verify that the mapping path is actually plumbed (identity alone wouldn’t distinguish “mapper was called” from “mapper was bypassed”). Lives in non-test code so downstream slices can reuse it as a smoke-test mapper.

Fields

offset: i32

Trait Implementations

impl Debug for OffsetRowMapper

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

Formats the value using the given formatter.

impl RowMapper for OffsetRowMapper

fn map_row(&self, _from: usize, _to: usize, row: u32) -> u32

Translate row (a 0-based line) in the group member at from_member_idx to the corresponding line in the member at to_member_idx — e.g. the matching line on the other side of a diff. Must be total: return a best-effort row rather than panic.