【高级技巧】Lua命令模式：装备误操作的撤销栈

local function dismantle(actor)
    takeitem(actor, "裁决之杖", 1)
    giveitem(actor, "玄铁", 3, 0, "分解")   -- 没有恢复路径
end

local undoStack = {}
local function doCmd(cmd)
    cmd.execute()
    undoStack[#undoStack + 1] = cmd
end
doCmd({
    execute = function()
        takeitem(actor, "裁决之杖", 1)
        giveitem(actor, "玄铁", 3, 0, "分解")
    end,
    undo = function()
        takeitem(actor, "玄铁", 3)
        giveitem(actor, "裁决之杖", 1, 0, "撤销返还")
    end})
local last = table.remove(undoStack)
last.undo()                              -- 一键撤销