// see_cell should not be exposed to user scripts. The game should
// never disclose grid coordinates to the player. Therefore we load it
// only into the core Lua interpreter (dlua), never into the user
// script interpreter (clua).

const struct luaL_reg you_dlib[] =

static const struct luaL_reg you_dlib[] =

void dluaopen_you(lua_State *ls)
{
    luaL_openlib(ls, "you", you_dlib, 0);
}

extern const struct luaL_reg you_dlib[];

void dluaopen_you(lua_State *ls);    

    dluaopen_you(dlua);

    luaL_openlib(dlua, "you", you_dlib, 0);