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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. template <typename Iter, typename FEach, typename FJoin>
  5. void for_each_and_join(Iter iter, Iter end, FEach&& feach, FJoin&& fjoin)
  6. {
  7.     if (iter == end)
  8.          return;
  9.     while (true)
  10.     {
  11.         feach(*iter);
  12.         Iter curr = iter;
  13.         if (++iter==end)
  14.             return;
  15.         fjoin(*curr, *iter);
  16.     }
  17. }
  18.  
  19. int main() {
  20.     std::vector<int> values = { 1, 2, 3, 4, 5 };
  21.     for_each_and_join(values.begin(), values.end()
  22.     ,  [](auto v) { std::cout << v; }
  23.     ,  [](auto, auto) { std::cout << ","; }
  24.     );
  25. }
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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1,2,3,4,5
https://ideone.com/fR5S9H
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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