array_map.hpp

template<class KEY,class T>
const T& ArrayMap<KEY,T>::operator [] (const KEY& key) const {
  int i = index_of(key);
  if (i != -1)
    return map[i].second;

  std::ostringstream answer;
  answer << "ArrayMap::operator []: key(" << key << ") not in Map";
  throw KeyError(answer.str());
}