code: func (l *State) RawEqual(index1, index2 int) bool {
  	if o1, o2 := l.indexToValue(index1), l.indexToValue(index2); o1 != nil && o2 != nil {
  		return o1 == o2
  	}
  	return false
  }
docs: // RawEqual verifies that the values at index1 and index2 are primitively
  // equal (that is, without calling their metamethods).
  //
  // http://www.lua.org/manual/5.2/manual.html#lua_rawequal