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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class foo {
  5.     int data;
  6. public:
  7.     template <typename T, typename = enable_if_t<is_constructible<T, int>::value>>
  8.     foo(const T& i) : data{ i } { cout << "Value copy ctor" << endl; }
  9.  
  10.     template <typename T, typename = enable_if_t<is_constructible<T, int>::value>>
  11.     foo(T&& i) : data{ i } { cout << "Value move ctor" << endl; }
  12.  
  13.     foo(const foo& other) : data{ other.data } { cout << "Copy ctor" << endl; }
  14.  
  15.     foo(foo&& other) : data{ other.data } { cout << "Move ctor" << endl; }
  16.  
  17.     operator int() { cout << "Operator int()" << endl; return data; }
  18. };
  19.  
  20. int main() {
  21.     foo obj1(42);
  22.     foo obj2(obj1);
  23. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
Value move ctor
Copy ctor
https://ideone.com/6SRrGr
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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