Files
synapse/rust
Erik JohnstonandClaude Opus 5.5 a3fe79ed8c Port the room list sort and ranges to Rust
`rust/src/sliding_sync/room_lists/sort.rs` holds `sort_rooms` as a
`SortPlan`: the decision logic with the stream change cache shortcut,
and the caller fetching what each step asks for. `lists.rs` holds the
ranges to `SYNC` operations with the full-range no-sort shortcut, the
config combining across lists and room subscriptions, and the decision
half of `_filter_relevant_rooms_to_send`, including the reset for a
connection with too many rooms to update.

The Python ranges loop moves, unchanged, into `_sync_list_ops`, so the
test can call it. It keeps a quirk the Rust ports: once a room combines
with a config from an earlier list, every later room in the same list
takes the combined config too.

The relevant room map is an `IndexMap`, which keeps Python's dict order,
so `indexmap` becomes a direct dependency. It was already in the tree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L51DoxB8VnH8UjXJFDgpNG
2026-10-16 11:35:02 +00:00
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