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  1. #include <iostream>
  2. #include <unordered_map>
  3.  
  4. struct Test
  5. {
  6.     std::unordered_map<int, int> v;
  7.     std::unordered_map<int, int>::iterator vend;
  8.  
  9.     Test(std::unordered_map<int, int>::iterator &it)
  10.         : vend { v.end() }
  11.     {
  12.         it = this->vend;
  13.     };
  14.  
  15.     Test() = delete;
  16.     Test(Test const &) = delete;
  17.     Test(Test &&) = default; // <- line in question
  18. };
  19.  
  20. int main()
  21. {
  22.     std::unordered_map<int, int>::iterator it;
  23.     std::unordered_map<int, Test> m;
  24.     m.emplace(0, Test{ it });
  25.     std::cout << std::boolalpha << (m.at(0).v.end() == it) << "\n";
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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Standard input is empty
stdout
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true
https://ideone.com/hhN1gX
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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