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  1. #include <iostream>
  2. #include <type_traits>
  3.  
  4. using namespace std;
  5.  
  6. class C
  7. {
  8. private:
  9.     class integral {};
  10.     class floatingpoint {};
  11.  
  12.     template<typename T>
  13.     using SelectOverload =
  14.         typename conditional<
  15.             is_integral<T>::value,
  16.             integral,
  17.             typename conditional<is_floating_point<T>::value,
  18.                 floatingpoint,
  19.                 void
  20.             >::type
  21.         >::type;
  22.  
  23. public:
  24.     template<typename T>
  25.     explicit C(T&& value) { init(forward<T>(value), SelectOverload<T>()); }
  26.  
  27. private:    
  28.     template<typename T>
  29.     void init(T&& value, integral) { cout << "integral" << std::endl; }
  30.     template<typename T>
  31.     void init(T&& value, floatingpoint) { cout << "floating point" << std::endl; }
  32.  
  33. };
  34.  
  35. int main()
  36. {
  37.     C a(1);
  38.     C b(1.0);
  39. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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integral
floating point
https://ideone.com/TCigR3
int/float constructors 2
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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