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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class Test {
  6. public:
  7.     Test()             { cout << "Test()\n"; }
  8.     Test(int x):val_(x){ cout << "Test(" << x << ")\n"; }
  9.     Test(const Test& t):val_(t.val_) { cout << "Test(const Test& " << t.val_ << ")\n"; }
  10.     Test(Test&&t)      :val_(t.val_) { t.val_ = 0; cout << "Test(const Test&& " << t.val_ << ")\n"; }
  11.     Test& operator = (const Test& t)  {
  12.         cout << "Test& operator = (const Test& " << t.val_ <<")\n";
  13.         val_ = t.val_;
  14.         return *this;}
  15.     Test& operator = (Test&& t) {
  16.         cout << "Test& operator = (const Test&&" << t.val_ <<")\n";
  17.         val_ = t.val_; t.val_ = 0;
  18.         return *this;}
  19.     ~Test()           { cout << "~Test(" << val_ <<")\n"; }
  20.     int val() const { return val_; }
  21. private:
  22.     int val_ = 0;
  23. };
  24.  
  25.  
  26. int main(int argc, const char * argv[])
  27. {
  28.     long long L, M;
  29.     Test * t = reinterpret_cast<Test*>(&L);
  30.     *t = Test(5);
  31.     cout << "t->val() = " << t->val() << endl;
  32.     cout << "-------\n";
  33.  
  34.     Test * u = new(&M) Test(6);
  35.     cout << "u->val() = " << u->val() << endl;
  36.  
  37. }
  38.  
  39.  
Success #stdin #stdout 0s 4400KB
comments (?)
stdin
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Standard input is empty
stdout
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Test(5)
Test& operator = (const Test&&5)
~Test(0)
t->val() = 5
-------
Test(6)
u->val() = 6
https://ideone.com/RvQSax
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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