lpart_vec.h

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#ifndef LPART_VEC_H
#define LPART_VEC_H
 
#include <vector>
#include <memory>
#include <iostream>
 
class lpart_vec {
  public:
    std::vector<std::unique_ptr<lpart>> v;
 
    template <typename T>
    void add_lpart(T part) {
      static_assert(std::is_base_of<lpart, T>::value,
                    "T must be derived from lpart.");
      v.push_back(std::make_unique<T>(part));
    };
 
    lpart_vec cpy () const {
      // Return a copy of the instance.
      lpart_vec lv;
      lv.v = clone_vec();
      return lv;
    };
 
  private:
    std::vector<std::unique_ptr<lpart>> clone_vec () const {
      // Return a copy of the internal vector.
      std::vector<std::unique_ptr<lpart>> _v;
      for (auto &ptr : v) {
        _v.push_back(std::unique_ptr<lpart>(ptr->clone()));
      }
      return _v;
    };
 
  friend std::ostream& operator<< (std::ostream &out, const lpart_vec &parts) {
    out << "lpart_vec[";
    int part_index = 0;
    for (auto &part_ptr : parts.v) {
      out << std::endl << "#" << part_index << ": " << *part_ptr;
      part_index++;
    }
    out << "]";
    return out;
  };
};
 
#endif // LPART_VEC_H