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  1.     #include <iostream>
  2.  
  3.     template <typename T> struct identity { typedef T type; };
  4.  
  5.     template<typename DT, int DV, void (DT::*DF)(int)>
  6.     struct Description
  7.     {
  8.         typedef DT T;                         // OK
  9.         static const int V = DV;              // OK
  10.     };
  11.  
  12.     template <typename DT, int DV, void (DT::*DF)(int)>
  13.     typename identity<void (DT::*)(int)>::type function(Description<DT, DV, DF>) {
  14.       return DF;
  15.     }
  16.  
  17.     struct TestClass
  18.     {
  19.         void TestFunc( int x ) { std::cout << "Value is: " << x << std::endl; }
  20.     };
  21.  
  22.     int main()
  23.     {
  24.         typedef Description<TestClass, 5, &TestClass::TestFunc> TCD;
  25.         TCD tcd;
  26.  
  27.         TestClass t;
  28.         (t.*function(tcd))(5);
  29.     }
Success #stdin #stdout 0.01s 2724KB
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stdin
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Standard input is empty
stdout
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Value is: 5
https://ideone.com/bgXwf
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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