core_interpreter.h

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#if !defined(VITA_CORE_INTERPRETER_H)
#define      VITA_CORE_INTERPRETER_H
 
#include "kernel/common.h"
#include "kernel/value.h"
#include "kernel/vitafwd.h"
 
namespace vita
{
 
class symbol_params
{
public:
  [[nodiscard]] virtual value_t fetch_arg(unsigned) = 0;
 
  virtual value_t fetch_opaque_arg(unsigned) = 0;
 
  [[nodiscard]] value_t operator[](unsigned i) { return fetch_arg(i); }
 
  [[nodiscard]] virtual terminal_param_t fetch_param() const = 0;
 
  [[nodiscard]] virtual value_t fetch_var(unsigned) { return {}; }
};
 
class core_interpreter : public symbol_params
{
public:
  value_t run() { return run_nvi(); }
  [[nodiscard]] double penalty() { return penalty_nvi(); }
  [[nodiscard]] bool is_valid() const { return is_valid_nvi(); }
 
private:
  virtual value_t run_nvi() = 0;
  virtual double penalty_nvi() = 0;
  virtual bool is_valid_nvi() const = 0;
};
 
template<class T> value_t run(const T &ind)
{
  return interpreter<T>(&ind).run();
}
 
}  // namespace vita
 
#endif  // include guard