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use std

const main = {
        match (gen_a(), gen_b())
        | (`std.Err _, _): std.put("error case 1")
        | (_, `std.Err _): std.put("error case 2")
        | (`std.Ok L, `std.Ok N):
                std.put("l = {} n = {}\n", L, N)
        ;;
}

var gen_a : (-> std.result(byte[:][:], void)) = {
        var ret = [][:]

        for var j = 0; j < 4; ++j
                std.slpush(&ret, std.fmt("{}", j))
        ;;

        if 1 + 1 > 3
                -> `std.Err void
        ;;

        -> `std.Ok ret
}

var gen_b : (-> std.result(int, void)) = {
        if 1 + 1 > 3
                -> `std.Err void
        ;;

        -> `std.Ok 5
}