Mutation.hh

// Copyright QED Software 2023.
 
#ifndef GRAIL_MUTATION_H
#define GRAIL_MUTATION_H
 
#include <memory>
#include <random>
#include <vector>
 
namespace grail
{
namespace evolution
{
 class EvoScript;
 class EvoParam;
 
 struct Mutation
 {
 public:
 enum class MutationSelectionType
 {
 ITERATE_AND_TEST_P,
 SELECT_P_OF_N
 };
 
 Mutation(double mutationPhaseRate = 1.0,
 double mutateIndividualRate = 0.09,
 double mutateChromosomeRate = 0.5,
 bool mutateBothParentsAndChildren = true,
 std::mt19937_64::result_type seed = std::random_device{}());
 virtual ~Mutation();
 
 virtual void Perform(const std::vector<std::unique_ptr<EvoScript>>& parentPopulation,
 const std::vector<std::unique_ptr<EvoScript>>& childrenPopulation);
 
 std::vector<std::unique_ptr<EvoScript>> populationAfter{};
 
 double MutationPhaseRate = 0.0;
 
 double MutateIndividualRate = 0.0;
 
 double MutateChromosomeRate = 0.0;
 
 bool MutateBothParentsAndChildren = false;
 
 protected:
 std::mt19937_64 randGen;
 MutationSelectionType RandomResolutionTypeForIndividual = MutationSelectionType::SELECT_P_OF_N;
 MutationSelectionType RandomResolutionTypeForChromosome = MutationSelectionType::SELECT_P_OF_N;
 
 protected:
 virtual void MutateIndividual(EvoScript& individual);
 virtual void MutateChromosome(EvoScript& individual, EvoParam& chromosome);
 };
}
}
 
#endif