boost::bind 生病了 无缘无故抱怨

Question

我什么都试过了，这东西简直是毫无意义，真的…… 这是有问题的代码：

    CRoom* pRoom = &mRooms[pClient->iCurChannel][pClient->iCurRoom];
    pClient->bPendingOperation = true;
    pRoom->OnBattlePlayerRespawn(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);// doesnt copmlain
    pRoom->mMainData.mStrand.post(boost::bind(&CRoom::OnBattlePlayerRespawn, pRoom, pClient, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 55, 4563)); // complains, wtf?

OnBattlePlayerRespawn 声明如下：

    void CRoom::OnBattlePlayerRespawn(CClient* pClient, uint32_t dwEquipItemSlot1, uint32_t dwEquipItemSlot2, uint32_t dwEquipItemSlot3, uint32_t dwEquipItemSlot4, uint32_t dwEquipItemSlot5, uint32_t dwSpecial1, uint32_t dwEquipItemSlot6, uint32_t dwEquipItemSlot7, uint32_t dwEquipItemSlot8, uint32_t dwEquipItemSlot9, uint32_t dwEquipItemSlot10, uint32_t dwSpecial2)

编译器错误：

    `Error      no matching function for call to `bind(void (CRoom::*)(CClient*, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t), CRoom*&, CClient*&, int, int, int, int, int, int, int, int, int, int, int, int)'`
    candidate expects 2 arguments, 15 provided
    pRoom->mMainData.mStrand.post(boost::bind(&CRoom::OnBattlePlayerRespawn, pRoom, pClient, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 55, 4563)); // complains, wtf?

“候选人期望 2 个参数，提供 15 个参数”是认真的吗？那么为什么常规通话有效呢？ 我无法真正解决，不胜感激。

谢谢。

Answer 1

这个错误的原因很简单——你试图绑定太多的参数。

根据documentation

此实现支持最​​多具有九个参数的函数对象。这是一个实现细节，而不是设计的固有限制。