在我一直在做的任務中,我一直在反駁這個問題,並且似乎無法完全解決這個問題。我寫了一個小測試課來證明我正在做什麼,希望有人能解釋我需要做的事情。函數指向模板類成員函數的指針? (C++)
//Tester class
#include <iostream>
using namespace std;
template <typename T>
class Tester
{
typedef void (Tester<T>::*FcnPtr)(T);
private:
T data;
void displayThrice(T);
void doFcn(FcnPtr fcn);
public:
Tester(T item = 3);
void function();
};
template <typename T>
inline Tester<T>::Tester(T item)
: data(item)
{}
template <typename T>
inline void Tester<T>::doFcn(FcnPtr fcn)
{
//fcn should be a pointer to displayThrice, which is then called with the class data
fcn(this->data);
}
template <typename T>
inline void Tester<T>::function()
{
//call doFcn with a function pointer to displayThrice()
this->doFcn(&Tester<T>::displayThrice);
}
template <typename T>
inline void Tester<T>::displayThrice(T item)
{
cout << item << endl;
cout << item << endl;
cout << item << endl;
}
- 和這裏的主:
#include <iostream>
#include "Tester.h"
using namespace std;
int main()
{
Tester<int> test;
test.function();
cin.get();
return 0;
}
-and最後,我的編譯器錯誤(VS2010)
c:\users\name\documents\visual studio 2010\projects\example\example\tester.h(28): error C2064: term does not evaluate to a function taking 1 arguments
1> c:\users\name\documents\visual studio 2010\projects\example\example\tester.h(26) : while compiling class template member function 'void Tester<T>::doFcn(void (__thiscall Tester<T>::*)(T))'
1> with
1> [
1> T=int
1> ]
1> c:\users\name\documents\visual studio 2010\projects\example\example\tester.h(21) : while compiling class template member function 'Tester<T>::Tester(T)'
1> with
1> [
1> T=int
1> ]
1> c:\users\name\documents\visual studio 2010\projects\example\example\example.cpp(7) : see reference to class template instantiation 'Tester<T>' being compiled
1> with
1> [
1> T=int
1> ]
希望,我在測試類註釋會告訴你我米試圖做。感謝您花時間看這個!
確保如果合適,添加作業標籤。另外,請看'boost :: bind',特別是'boost :: mem_fn'。 –