Function get_pen_mirror

library/LuaApi.cpp:785–800

}

static void get_pen_mirror(lua_State *L, int idx)
{
    lua_getuservalue(L, idx);

    if (lua_isnil(L, -1))
    {
        lua_pop(L, 1);

        Pen pen;
        Lua::CheckPen(L, &pen, idx, false, false);
        make_pen_table(L, pen);

        lua_dup(L);
        lua_setuservalue(L, idx);
    }
}

static int dfhack_pen_index(lua_State *L)
{