using namespace simdjson;

int foreach_found_field(auto&& apply, ondemand::object& o, auto const&... ks)
{
    auto mks = std::array{std::pair<bool, std::string_view>{false, ks}...};
    int leftKs = mks.size();

    for(ondemand::field fld : o)
    {
        int i = 0;
        for(auto&[matched, k] : mks)
        {
            if(! matched && fld.key() == k)
            {
                apply(i, fld);
                matched = true;
                if(--leftKs == 0)
                    return 0;
                break;
            }

            ++i;
        }
    }

    return leftKs;
}