Function dfhack_pen_index

library/LuaApi.cpp:802–821

}

static int dfhack_pen_index(lua_State *L)
{
    lua_settop(L, 2);
    luaL_checktype(L, 1, LUA_TUSERDATA);

    // check metatable
    if (!lua_getmetatable(L, 1))
        luaL_argerror(L, 1, "must be a pen");
    lua_pushvalue(L, 2);
    lua_rawget(L, -2);
    if (!lua_isnil(L, -1))
        return 1;

    // otherwise read from the mirror table, creating it if necessary
    lua_settop(L, 2);
    get_pen_mirror(L, 1);
    lua_pushvalue(L, 2);
    lua_rawget(L, -2);
    return 1;
}

static int pen_pnext(lua_State *L)
{