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  1. #include <algorithm>
  2. #include <iterator>
  3. #include <iostream>
  4. #include <memory>
  5. #include <numeric>
  6. #include <vector>
  7.  
  8. using namespace std;
  9.  
  10. struct foo {
  11.     int b() const { return _b; }
  12.     int a() const { return _a; }
  13.     int r() const { return _r; }
  14.     const int _b;
  15.     const int _a;
  16.     const int _r;
  17. };
  18.  
  19. template <int (foo::*T)() const>
  20. auto func = [](const auto init, const auto i){ return init + (i->*T)(); };
  21.  
  22. int main() {
  23. 	const vector<foo*> foos { new foo{ 0, 1, 2 }, new foo{ 3, 4, 5 }, new foo{ 6, 7, 8 } };
  24.  
  25. 	cout << accumulate(cbegin(foos), cend(foos), 0, func<&foo::r>);
  26.  
  27. 	for_each(begin(foos), end(foos), default_delete<foo>());
  28. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/s3sP6W
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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