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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. enum class E { e0, e1, e2, e3, };
  6.  
  7. static constexpr E get(int S)
  8. {
  9.     switch(S)
  10.     {
  11.     case 0: return E::e0;
  12.     case 1: return E::e1;
  13.     case 2: return E::e2;
  14.     default: return E::e3;
  15.     }
  16. }
  17.  
  18. template <int S>
  19. class C {
  20. public:
  21.     static const E e = get(S);
  22.     void out() const { cout << "e = " << int(e) << endl; }
  23.  
  24. };
  25.  
  26. int main(int argc, const char * argv[])
  27. {
  28.     C<1>().out();
  29.     C<2>().out();
  30.     C<123>().out();
  31. }
  32.  
Success #stdin #stdout 0s 4244KB
comments (?)
stdin
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Standard input is empty
stdout
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e = 1
e = 2
e = 3
https://ideone.com/dJ07Kh
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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