struct map_file_place
{
    std::string filename;
    int lineno;
    map_file_place(const std::string &s = "", int line = 0)
        : filename(s), lineno(line)
    {
    }
};

typedef std::map<std::string, map_file_place> map_load_info_t;
static map_load_info_t loaded_maps;

                        loaded_maps.find($2);

                        lc_loaded_maps.find($2);

                    if (i != loaded_maps.end())

                    if (i != lc_loaded_maps.end())

                    loaded_maps[$2] = map_file_place(lc_desfile, yylineno);

                    lc_map.place_loaded_from =
                        map_file_place(lc_desfile, yylineno);
                    lc_loaded_maps[$2] = lc_map.place_loaded_from;

typedef std::map<std::string, map_file_place> map_load_info_t;

extern std::string lc_desfile;
extern map_def     lc_map;
extern level_range lc_range;
extern depth_ranges lc_default_depths;
extern dlua_chunk lc_global_prelude;
extern bool lc_run_global_prelude;

extern map_load_info_t lc_loaded_maps;
extern std::string     lc_desfile;
extern map_def         lc_map;
extern level_range     lc_range;
extern depth_ranges    lc_default_depths;
extern dlua_chunk      lc_global_prelude;
extern bool            lc_run_global_prelude;

const int MAP_CACHE_VERSION = 1004;

const int              MAP_CACHE_VERSION = 1005;

map_load_info_t lc_loaded_maps;

        vdefs[nexist + i].read_index(inf);
        vdefs[nexist + i].set_file(base);

        map_def &vdef(vdefs[nexist + i]);
        vdef.read_index(inf);
        vdef.set_file(base);
        lc_loaded_maps[vdef.name] = vdef.place_loaded_from;
        vdef.place_loaded_from.clear();

    lc_loaded_maps.clear();

struct map_file_place
{
    std::string filename;
    int lineno;

    map_file_place(const std::string &s = "", int line = 0)
        : filename(s), lineno(line)
    {
    }
    void clear()
    {
        filename.clear();
        lineno = 0;
    }
};

    map_file_place  place_loaded_from;

    place_loaded_from.clear();

    writeString(outf, place_loaded_from.filename);
    writeLong(outf, place_loaded_from.lineno);

    place_loaded_from.filename = readString(inf);
    place_loaded_from.lineno   = readLong(inf);