codac2_Collection.h

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#pragma once
 
#include <type_traits>
#include <cassert>
#include <list>
#include <memory>
 
namespace codac2
{
  template<typename T>
  class Collection : public std::list<std::shared_ptr<T>>
  {
    public:
 
      Collection()
      { }
 
      template<typename... T_>
        requires ((!std::is_same_v<Collection<T>,T_>) && ...)
      Collection(const T_&... x)
      {
        (this->push_back(x), ...);
      }
 
      Collection(std::initializer_list<std::shared_ptr<T>> init)
        : std::list<std::shared_ptr<T>>(init)
      { }
 
      template<typename T_>
        requires std::is_base_of_v<T,T_>
      Collection(std::initializer_list<T_> x)
      {
        for(const auto& xi : x)
          this->push_back(xi);
      }
 
      Collection(const Collection<T>& c)
        : std::list<std::shared_ptr<T>>()
      {
        for(const auto& ci : c)
        {
          assert(ci);
          this->push_back(std::dynamic_pointer_cast<T>(ci->copy()));
        }
      }
 
      template<typename T_>
        requires std::is_base_of_v<T,T_>
      void push_back(const T_& x)
      {
        this->push_back(std::make_shared<T_>(x));
      }
 
      template<typename T_>
        requires std::is_base_of_v<T,T_>
      void push_back(const std::shared_ptr<T_>& x)
      {
        this->std::list<std::shared_ptr<T>>::push_back(x);
      }
  };
}