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# Objective Some sort calls and `Ord` impls are unnecessarily complex. ## Solution Rewrite the "match on cmp, if equal do another cmp" as either a comparison on tuples, or `Ordering::then_with`, depending on whether the compare keys need construction. `sort_by` -> `sort_by_key` when symmetrical. Do the same for `min_by`/`max_by`. Note that `total_cmp` can only work with `sort_by`, and not on tuples. When sorting collected query results that contain `Entity`/`MainEntity`/`RenderEntity` in their `QueryData`, with that `Entity` in the sort key: stable -> unstable sort (all queried entities are unique) If key construction is not simple, switch to `sort_by_cached_key` when possible. Sorts that are only performed to discover the maximal element are replaced by `max_by_key`. Dedicated comparison functions and structs are removed where simple. Derive `PartialOrd`/`Ord` when useful. Misc. closure style inconsistencies. ## Testing - Existing tests. |
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