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stl模板库成员函数重载类型混肴编译不通过解决方法

news 2025/7/16 9:50:31

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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