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  1. #include <algorithm>
  2. #include <vector>
  3. #include <functional>
  4.  
  5. class F {
  6.     int _a;
  7.  
  8. public:
  9.     F(const int a):_a(a) {}
  10.     int calc(const int x, const int k) const { return k * x + _a; }
  11. };
  12.  
  13. struct Invoker{
  14.     std::vector<int> invoke(const std::vector<int>& v, const F& f) const
  15.     {
  16.         using std::placeholders::_1;
  17.  
  18.         std::vector<int> ret(v.size());       
  19.         std::transform(
  20.             v.cbegin(),
  21.             v.cend(),
  22.             ret.begin(),
  23.             std::bind(&F::calc, f, _1, 2));
  24.         return ret;
  25.     }
  26. };
  27.  
  28. int main()
  29. {
  30.     const F f(2);
  31.     std::vector<int> v{4, 5, 6};
  32.     const Invoker invoker;
  33.     invoker.invoke(v, f);
  34.  
  35.     return 0;
  36. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/jZNd95
language:
C++14 (clang 8.0)
created:
7 years ago
visibility:
public

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