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  1. #include <iostream>
  2. #include <new>
  3.  
  4. class Test
  5. {
  6. public:
  7.     Test() = delete;
  8.  
  9.     Test(const Test&) = delete;
  10.     Test(Test&&) = delete;
  11.     Test& operator=(const Test&) = delete;
  12.     Test& operator=(Test&&) = delete;
  13.  
  14.     Test(int a, int b) : a_(a), b_(b) { std::cout << "ctor: " << a_ << ' ' << b_ << '\n'; }
  15.     virtual ~Test() { std::cout << "dtor: " << a_ << ' ' << b_ << '\n'; }
  16.  
  17.     int a_;
  18.     int b_;
  19. };
  20.  
  21. class B
  22. {
  23. public:
  24.     B()
  25.     {
  26.         ::new (test_array_storage + 0 * sizeof(Test)) Test(1, 2);
  27.         ::new (test_array_storage + 1 * sizeof(Test)) Test(3, 4);
  28.     }
  29.  
  30.     B(const B&) = delete;
  31.     B(B&&) = delete;
  32.     B& operator=(const B&) = delete;
  33.     B& operator=(B&&) = delete;
  34.  
  35.     ~B()
  36.     {
  37.         reinterpret_cast<Test*>(test_array_storage + 1 * sizeof(Test))->~Test();
  38.         reinterpret_cast<Test*>(test_array_storage + 0 * sizeof(Test))->~Test();
  39.     }
  40.  
  41. private:
  42.     alignas(Test) unsigned char test_array_storage[sizeof(Test) * 2];
  43. };
  44.  
  45. int main()
  46. {
  47.     B b;
  48.     Test test[2] = {{1, 2}, {3, 4}};
  49. }
  50.  
Success #stdin #stdout 0s 4356KB
comments (?)
stdin
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Standard input is empty
stdout
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ctor: 1 2
ctor: 3 4
ctor: 1 2
ctor: 3 4
dtor: 3 4
dtor: 1 2
dtor: 3 4
dtor: 1 2
https://ideone.com/Zd4rFY
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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