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我是模板新手,在使用它们时遇到了一些问题。我在下面发布了我无法编码的代码。在如何做这件作品方面需要帮助

我需要将函数指针作为模板参数传递给测试器类,并将 TClass 实例作为参数传递给构造函数。在构造函数中,函数指针将用于将 testFunc 绑定到测试器类的成员变量,该成员变量是函数指针。然后,当测试器类被销毁时,将调用 testFunc。无法解决模板的类型扣除

#include <iostream>

using namespace std;

template< class TClass, TClass::*fptr>
class tester
{

    public:
        tester(TClass & testObj, ...) //... refer to the arguments of the test function which is binded
        {
            //bind the function to member fptr variable
        }

        ~tester()
        {
            //call the function which was binded here
        }

    private:
        (TClass::*fp)(...) fp_t;
};

class Specimen
{
    public:
        int testFunc(int a, float b)
        {
            //do something
            return 0;
        }
}

int main()
{
    typedef int (Specimen::*fptr)(int,float);
    Specimen sObj;

    {
        tester<fptr> myTestObj(sObj, 10 , 1.1);
    }
    return 0
}
4

2 回答 2

0

我混合std::functionstd::bind接近你的问题:

template<typename F>
class tester
{
    function<F> func;
public:
    template <typename H, typename... Args>
    tester(H &&f, Args&&... args) : func(bind(f, args...))
    {
    }

    ~tester()
    {
        func();
    }
};

class Specimen
{
public:
    int testFunc(int a, float b)
    {
        return a + b;
    }
};

int main()
{
    Specimen sObj;

    tester<int()> myTestObj(&Specimen::testFunc, &sObj, 10 , 1.1);
}

实时代码

于 2013-11-12T18:47:50.340 回答
0

使用 C++11 std::bind

#include <functional>
#include <iostream>

class Specimen
{
public:
  int testFunc(int a, float b)
  {
    std::cout << "a=" << a << " b=" << b <<std::endl;
    return 0;
  }
};

int main()
{
  Specimen sObj;
  auto test = std::bind(&Specimen::testFunc, &sObj, 10, 1.1);
  test();
}

检查文档

于 2013-11-12T18:30:26.717 回答