#include <stdexcept>

#include "kryp_solution.h"

Kryp::Kryp() : first(nullptr) {}
Kryp::~Kryp() { delete first; }

bool Kryp::empty() const { return first == nullptr; }

void Kryp::push(Kryp_Data const& i)
{
  first = new Element(i, first);
}

Kryp_Data Kryp::pop()
{
  if ( empty() )
  {
    // std::cerr << "tom kryp" << std::endl;
    throw std::logic_error("tom kryp");
  }
  else
  {
    Element* victim{ first };
    Kryp_Data data = victim->data;
    first = victim->next;
    victim->next = nullptr;
    delete victim;
    return data;
  }
}