evaluator.h

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#if !defined(VITA_EVALUATOR_H)
#define      VITA_EVALUATOR_H
 
#include "kernel/fitness.h"
#include "kernel/gp/src/lambda_f.h"
#include "kernel/random.h"
 
namespace vita
{
 
class cached_evaluator
{
public:
  virtual void clear() {}
};
 
template<class T>
class evaluator : public cached_evaluator
{
public:
  virtual ~evaluator() = default;
 
  virtual fitness_t operator()(const T &) = 0;
 
  // Serialization.
  virtual bool load(std::istream &);
  virtual bool save(std::ostream &) const;
 
  // The following methods have a default implementation (usually empty).
  virtual fitness_t fast(const T &);
  virtual std::unique_ptr<basic_lambda_f> lambdify(const T &) const;
};
 
enum class test_evaluator_type {distinct, fixed, random};
 
template<class T>
class test_evaluator final : public vita::evaluator<T>
{
public:
  explicit test_evaluator(test_evaluator_type = test_evaluator_type::random);
 
  fitness_t operator()(const T &) override;
 
private:
  std::vector<T>  buffer_;
  test_evaluator_type et_;
};
#include "kernel/evaluator.tcc"
 
}  // namespace vita
 
#endif  // include guard