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  1. #include <cstdio>
  2. #include <deque>
  3. #include <queue>
  4.  
  5. template<typename E, typename C = std::deque<E>>
  6. struct facker
  7. {
  8. 	using Q = std::queue<E, C>;
  9.  
  10. 	struct unko : Q
  11. 	{
  12. 		C & c2;
  13.  
  14. 		unko() noexcept : c2{ this->Q::c }
  15. 		{
  16. 		}
  17. 	};
  18.  
  19. 	Q & original_queue;
  20. 	unko peeper;
  21.  
  22. 	facker( Q & q ) : original_queue{ q }
  23. 	{
  24. 		this->original_queue.swap( this->peeper );
  25. 	}
  26.  
  27. 	~facker()
  28. 	{
  29. 		this->original_queue.swap( this->peeper );
  30. 	}
  31. };
  32.  
  33. auto main() -> int
  34. {
  35. 	std::queue<double> q;
  36. 	for ( auto i = 0; i < 5; i++ )
  37. 		q.push( static_cast<double>( i ) );
  38.  
  39. 	{
  40. 		facker<double> f{ q };
  41.  
  42. 		for ( auto & elem : f.peeper.c2 )
  43. 			std::printf( "%.1lf\n", elem );
  44. 	}
  45. }
  46.  
Success #stdin #stdout 0s 3232KB
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https://ideone.com/0XGq6C
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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