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  1. #include <iostream>
  2. #include <array>
  3.  
  4. using	uu =					std::size_t;
  5.  
  6. template< uu... ns >            struct  seq{};
  7.  
  8. template< uu from = 0 >
  9. struct                          index_from
  10. {
  11.     template< uu n, uu... ns >  struct  end : end< n - 1, n - 1, ns... > {};
  12.     template< uu... ns >        struct  end< from, ns... > : seq< ns... > {};
  13.     template< uu last >         struct  to : end< last + 1 > {};
  14. };
  15.  
  16. template< uu... ns >
  17. constexpr	auto                make_index_array( seq< ns... > )
  18. {
  19.     return  std::array< uu, sizeof...( ns ) > { { ns... } };
  20. }
  21.  
  22. using   namespace   std;
  23.  
  24. int main()
  25. {
  26. 	auto	arr = make_index_array( index_from< 10 >::to< 15 >{} );
  27. 	for( const auto v : arr )
  28. 		cout << v << endl;
  29.  
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 3468KB
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Standard input is empty
stdout
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10
11
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13
14
15
https://ideone.com/4jTMMo
const series
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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