#ifndef sk_VM_HPP
#define sk_VM_HPP

#include "commons.hpp"
#include "Program.hpp"

namespace sk
{
  struct Frame {
    std::shared_ptr<Program> program;
  };

  class VM
  {
  public:
    explicit VM();
    virtual ~VM();

    std::string string() const;
    void exec(std::shared_ptr<Program> program);

  private:
    std::vector<Frame> m_frames;
    std::vector<param_t> m_stack;

    size_t m_pc = 0;

    void exec();

    std::shared_ptr<Program> program() const;

    void push(param_t param);
    param_t pop();
  };
}

#endif