Работа с unordered_map

    struct LOCATION
    {
        DATA_TYPE       type;
        unsigned int    pos;
    };
    typedef std::unordered_map<unsigned int, LOCATION> IDToLOCATIONMap;
 
    IDToLOCATIONMap             essence_id_index_map;
    IDToLOCATIONMap             addon_id_index_map;
    IDToLOCATIONMap             talk_id_index_map;
    IDToLOCATIONMap             recipe_id_index_map;
    IDToLOCATIONMap             config_id_index_map;
 
    IDToLOCATIONMap::iterator   esssence_id_index_itr;
    IDToLOCATIONMap::iterator   addon_id_index_itr;
    IDToLOCATIONMap::iterator   talk_id_index_itr;
    IDToLOCATIONMap::iterator   recipe_id_index_itr;
    IDToLOCATIONMap::iterator   config_id_index_itr;

void elementdataman::setup_hash_map()
{
#define ADD_HASH_MAP(ids, typ, arr) \
    p.type = typ;\
    for(i=0; i<arr.size(); i++)\
    {\
    start_ptr_array[typ] = &(arr[0]);\
    p.pos = i;\
    ids##_id_index_map[arr[i].id] = p;\
}
 
    unsigned int i;
    LOCATION p;
    ///*
    ADD_HASH_MAP(addon, DT_EQUIPMENT_ADDON, equipment_addon_array);
    ADD_HASH_MAP(essence, DT_EQUIPMENT_ESSENCE, equipment_essence_array);
........................
#undef ADD_HASH_MAP
}

enum DATA_TYPE {
    DT_INVALID,
    DT_EQUIPMENT_ADDON,
    DT_EQUIPMENT_ESSENCE,
........................
}