不能明确专业化

Question

我收到此错误:

严重程序代码说明项目文件行抑制状态错误C2910'addingStuff :: addingStuffFunc':无法显式专用BuckysTemplateSpecialization c:\ users\amanuel\documents\visual studio 2015\projects\buckystemplatespecialization\buckystemplatespecializ

当我尝试运行此代码时:

#include<iostream>
#include<string>

template<class F, class S>
class addingStuff {
public:
    addingStuff(F fCons, S sCons) : f(fCons), s(sCons){}

    F addingStuffFunc();

private:
    F f; S s;
};

template<class F, class S>
F addingStuff<F, S>::addingStuffFunc() {
    return(f + s);
}

template<>
class addingStuff<std::string , std::string>{
public:
    addingStuff(std::string sConst, std::string s2Const):s(sConst), s2(s2Const){}   
    std::string addingStuffFunc();
private:
    std::string s, s2;
};

template<>
std::string addingStuff<std::string, std::string>::addingStuffFunc() {
    return "Sorry.. Adding strings is Illegal!!";
}

int main() {
    addingStuff<std::string, std::string> exampleStuff("Hello " , "World");
    std::cout << exampleStuff.addingStuffFunc() << std::endl;
}

没有线索为什么..

Answer 1

你只想要:

std::string addingStuff<std::string, std::string>::addingStuffFunc() {
    return "Sorry.. Adding strings is Illegal!!";
}

额外template <>被解释为成员函数的模板id,并且代码被解释为它的显式特征<>.但addingStuffFunc不是函数模板,因此错误.