mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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#pragma once
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#include <map>
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#include <ostream>
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#include <string>
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#include <vector>
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namespace solidity::phaser
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{
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/**
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* An object that represents a sequence of optimiser steps that can be applied to a program.
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* Such sequences are used in our genetic algorithm to represent individual members of the
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* population.
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*
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* To calculate the fitness of an individual one must apply its sequence to a specific program.
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* This class does not provide any means to do so. It just stores information.
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*
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* Once created a sequence cannot be changed. The only way to mutate it is to generate a new
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* chromosome based on the old one.
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*/
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class Chromosome
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{
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public:
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Chromosome() = default;
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explicit Chromosome(std::vector<std::string> _optimisationSteps):
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m_genes(stepsToGenes(_optimisationSteps)) {}
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explicit Chromosome(std::string _genes):
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// NOTE: We don't validate the genes - they're only checked at the point of conversion to
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// actual optimisation steps names. This is very convenient in mutation tests.
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m_genes(std::move(_genes)) {}
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static Chromosome makeRandom(size_t _length);
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size_t length() const { return m_genes.size(); }
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std::string const& genes() const { return m_genes; }
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std::vector<std::string> optimisationSteps() const { return genesToSteps(m_genes); }
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friend std::ostream& operator<<(std::ostream& _stream, Chromosome const& _chromosome);
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bool operator==(Chromosome const& _other) const { return m_genes == _other.m_genes; }
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bool operator!=(Chromosome const& _other) const { return !(*this == _other); }
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static std::string const& randomOptimisationStep();
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static char randomGene();
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static std::string stepsToGenes(std::vector<std::string> const& _optimisationSteps);
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static std::vector<std::string> genesToSteps(std::string const& _genes);
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private:
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static std::vector<std::string> allStepNames();
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std::string m_genes;
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};
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}
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