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  1. #include <iostream>
  2.  
  3. template <typename R, typename... Tn>
  4. class func
  5. {
  6.     R (*fptr)(Tn...); // C2091
  7. public:
  8.     func() : fptr(nullptr) {}
  9.     func( R (*f) (Tn...) ) : fptr(f) {} // C2091
  10.     R operator()(Tn... args)
  11.     { // C2091
  12.         return fptr(args...);
  13.     }
  14.     func& operator=( R (*f) (Tn...) ) // C2091
  15.     {
  16.         fptr = f;
  17.         return *this;
  18.     }
  19. };
  20.  
  21. int foo(int a, int b)
  22. {
  23.     std::cout << "foo\n";
  24.     return 0;
  25. }
  26.  
  27. int main()
  28. {
  29.     func<int, int, int> myfunc;
  30.     myfunc = foo; // C2679: binary '=' : no operator found which takes
  31.     // a right-hand operand of type 'int (__cdecl *)(int,int)' (or 
  32.     // there is no acceptable conversion)
  33.     return myfunc(1, 2);
  34. }
Success #stdin #stdout 0s 3340KB
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foo
https://ideone.com/oN2jT2
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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