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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. using namespace std;
  5.  
  6. template<class T, int N>
  7. constexpr int Val = 3;
  8.  
  9. template<>
  10. constexpr int Val<int,0> = 5;
  11.  
  12.  
  13. template<int N>
  14. constexpr int Val<char,N> = N;
  15.  
  16.  
  17. template<class T, int N, int M = Val<T,N>>
  18. class Test
  19. {
  20. public:
  21.     void method()
  22.     {
  23.         cout << M << endl;
  24.     }
  25. };
  26.  
  27. int main(int argc, const char * argv[])
  28. {
  29.     Test<int,0> t1;
  30.     t1.method();
  31.     Test<int,5> t2;
  32.     t2.method();
  33.     Test<char,7> t3;
  34.     t3.method();
  35.     Test<char,7,15> t4;
  36.     t4.method();
  37. }
  38.  
  39.  
  40.  
Success #stdin #stdout 0s 16064KB
comments (?)
stdin
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Standard input is empty
stdout
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5
3
7
15
https://ideone.com/OcNWRi
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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