如何在 C++ 中組合標志？

Question

例如，我想像這樣為OPENFILENAMEW編寫一個包裝器 function：

void BrowseForFile(bool bAllowMultiSelect, bool bDontAddToRecent...)
{
     OPENFILENAMEW ofn;
     
     if((bAllowMultiSelect == true) and (bDontAddToRecent == false))
     {
          ofn.Flags = OFN_ALLOWMULTISELECT;
     }

     else if((bAllowMultiSelect == false) and (bDontAddToRecent == true))
     {
          ofn.Flags = OFN_DONTADDTORECENT;
     }

     else if((bAllowMultiSelect == true) and (bDontAddToRecent == true))
     {
          ofn.Flags = OFN_ALLOWMULTISELECT | OFN_DONTADDTORECENT;
     }

     // and so on...
}

我是否必須像這樣編寫每個組合，或者有什么簡單的方法可以實現嗎？

Answer 1

這是@IgorTandetnik 和@AviBerger 建議的解決方案：

void BrowseForFile(bool bAllowMultiSelect, bool bDontAddToRecent...)
{
     OPENFILENAMEW ofn;
     
     if(bAllowMultiSelect == true)
     {
          ofn.Flags |= OFN_ALLOWMULTISELECT;
     }

     if(bDontAddToRecent == true)
     {
          ofn.Flags |= OFN_DONTADDTORECENT;
     }
}