Initializing a Sequence with Comma-Separated Values - C++ template

C++ examples for template:template function

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Description

Initializing a Sequence with Comma-Separated Values

Demo Code

#include <vector>
#include <iostream>
#include <iterator>
#include <algorithm>

using namespace std;

template<class Seq_T>
struct comma_helper {
  typedef typename Seq_T::value_type value_type;
  explicit comma_helper(Seq_T& x) : m(x) { }
  comma_helper& operator=(const value_type& x) {
    m.clear();/* w ww.  j  a va2 s. com*/
    return operator+=(x);
  }
  comma_helper& operator+=(const value_type& x) {
    m.push_back(x);
    return *this;
  }
  Seq_T& m;
};

template<typename Seq_T>
comma_helper<Seq_T>
initialize(Seq_T& x) {
  return comma_helper<Seq_T>(x);
}

template<class Seq_T, class Scalar_T>
comma_helper<Seq_T>&
operator,(comma_helper<Seq_T>& h, Scalar_T x) {

  h += x;
  return h;
}

int main() {
  vector<int> v{};
  int a = 2;

  int b = 5;
  initialize(v) = 0, 1, 1, a, 3, b, 8, 13;
  cout << v[3] << endl; // outputs 2
  system("pause");
  return EXIT_SUCCESS;
}

Result


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