I feel like the ocaml solution would fit zigs usecase well.

In ocaml you can redefine operators... but only in the context of another module.

So if I re-define + in some module Vec3, I can do:

  Vec3.(a + b + c + d)

Or even:

  let open Vec3 in
  a + b + c + d

So there you go, no "where did the + operator come from?" questions when reading the source, and still much nicer than:

  a.add(b).add(c).add(d)

I doubt zig will change though. The language is starting to crystallize and anything that solved this challenge would be massive.