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商城类网站建设需要多少钱头条指数

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商城类网站建设需要多少钱,头条指数,专业网络公司报价,个人网站建设与实现stl模板库成员函数重载类型混肴编译不通过解决方法这种方式编译不通过IsArithmetic和HasMemberList编译器存在混肴 template <typename T, typename Enable std::enable_if<IsArithmetic<T>::value>::type >static void DumpWrapper(T* filed, std::strin…

stl模板库成员函数重载类型混肴编译不通过解决方法
这种方式编译不通过IsArithmetic和HasMemberList编译器存在混肴

template <typename T, typename Enable = std::enable_if<IsArithmetic<T>::value>::type >static void DumpWrapper(T* filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());enum : std::size_t { IntValSize = sizeof(T) };if (IntValSize > 4){printf("%s:=>%016llx\r\n", fieldname.c_str(), *filed);}else{printf("%s:=>%08x\r\n", fieldname.c_str(), *filed);}}template <typename T, typename  Enable = std::enable_if<IsArithmetic<T>::value >::type  >static void DumpWrapper(T filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());enum : std::size_t { IntValSize = sizeof(T) };if (IntValSize > 4){printf("%s:=>%016llx\r\n", fieldname.c_str(), filed);}else{printf("%s:=>%08x\r\n", fieldname.c_str(), filed);}}template <typename T, typename Enable = EnableIfHasMemberList<T>>static void DumpWrapper(nop::S7PlusPacketValue<T>* filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());filed.Dump();}template <typename T, typename Enable = EnableIfHasMemberList<T>>static void DumpWrapper(nop::S7PlusPacketValue<T> filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());filed->Dump();}

解决方法必须明确重载IsArithmetic和HasMemberList编译器存在混肴,加上双重判断typename Enable = std::enable_if<IsArithmetic::value&!HasMemberList::value>::type来明确混肴条件,这种方式编译通过

template <typename T, typename Enable = std::enable_if<IsArithmetic<T>::value&!HasMemberList<T>::value>::type >static void DumpWrapper(T* filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());enum : std::size_t { IntValSize = sizeof(T) };if (IntValSize > 4){printf("%s:=>%016llx\r\n", fieldname.c_str(), *filed);}else{printf("%s:=>%08x\r\n", fieldname.c_str(), *filed);}}template <typename T, typename  Enable = std::enable_if<IsArithmetic<T>::value & !HasMemberList<T>::value>::type  >static void DumpWrapper(T filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());enum : std::size_t { IntValSize = sizeof(T) };if (IntValSize > 4){printf("%s:=>%016llx\r\n", fieldname.c_str(), filed);}else{printf("%s:=>%08x\r\n", fieldname.c_str(), filed);}}template <typename T, typename Enable = EnableIfHasMemberList<T>>static void DumpWrapper(nop::S7PlusPacketValue<T>* filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());filed.Dump();}template <typename T, typename Enable = EnableIfHasMemberList<T>>static void DumpWrapper(nop::S7PlusPacketValue<T> filed, std::string fieldname){printf("fieldname:=>%s\r\n", fieldname.c_str());filed->Dump();}

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