Sort system and query result based on user sort function

[Avokadoen]

Allow user to submit an optional sorting functions that will be used to sort results BEFORE executing the system or iterating the query

    var world = try WorldStub.WithEvents(.{
        Event("onFoo", .{
            SortResult(sortFn, SystemStruct1.func1),
            SystemStruct1.func2,
            SystemStruct2,
        }, .{}),
    }).init(testing.allocator, .{});

[Avokadoen]

@matkve could you describe a scenario where this would be useful? It would help as the current proposal will probably be rejected otherwise

[Avokadoen]

Alternative to this which would have a bit less overhead would be to specify sorting of component types in the storage, but then the question is how would sorting of multiple component types work

[Avokadoen]

Maybe if we expose explicit archetype sorting?

Example:

const Number = struct {
 decimal: DecimalComp,
 fraction: FracComp,
};

const sortFn = struct {
 pub fn sort(num_a: Number, num_b: Number) bool {
    if (num_a.decimal == num_b.decimal) {
      return num_a.fraction < num_b.fraction;
    }

    return num_a.decimal < num_b.decimal;
 }
}.sort;



const World = World.WithComponents(.{DecimalComp, FracComp}).WithStorageSorting(.{
 StorageSort(Number, sortFn),
}).Build();

Then it can be specified that systems are guaranteed to be dispatched/iterated in order within the same archetype.
I guess that would make it a lot more limiting in how useful it will be 🤔