Eric Coissac
3716eeff7f
- Introduce SeekMode::Rope for absolute rope-index positioning - Add CursorState.offset field to support local coordinate systems per cursor - Implement ForwardCursor.cursor() and BackwardCursor(cursor()) to create sub-cursors with independent offsets - Update tell(), get(i), set i, len() to use local coordinates (relative offset) - Add rope_tell(), reset()—deprecate old absolute behavior in favor of offset-aware API - Add comprehensive tests for sub-cursor semantics, including write/reset and bounds checking
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