module FDB::Tuple

def self._compare_elems(v1, v2)
  c1 = _code_for(v1)
  c2 = _code_for(v2)
  return c1 <=> c2 unless c1 == c2
  if c1 == @@NULL_CODE
    0
  elsif c1 == @@DOUBLE_CODE
    _compare_floats(v1, v2, true)
  elsif c1 == @@NESTED_CODE
    compare(v1, v2) # recurse
  else
    v1 <=> v2
  end
end