101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program 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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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_GP_PROGRAM_H
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#define BLT_GP_PROGRAM_H
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#include <cstddef>
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#include <functional>
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#include <type_traits>
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#include <string_view>
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#include <string>
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#include <utility>
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#include <iostream>
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#include <random>
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#include <blt/std/ranges.h>
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#include <blt/std/hashmap.h>
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#include <blt/std/types.h>
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#include <blt/std/utility.h>
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#include <blt/std/memory.h>
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#include <blt/gp/fwdecl.h>
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#include <blt/gp/typesystem.h>
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#include <blt/gp/operations.h>
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#include <blt/gp/tree.h>
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#include <blt/gp/stack.h>
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namespace blt::gp
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{
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class gp_program
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{
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public:
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explicit gp_program(type_system system): system(std::move(system))
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{}
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template<typename Return, typename... Args>
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void add_operator(const operation_t<Return(Args...)>& op)
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{
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auto return_type_id = system.get_type<Return>().id();
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auto& operator_list = op.get_argc() == 0 ? terminals : non_terminals;
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operator_list[return_type_id].push_back(operators.size());
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auto operator_index = operators.size();
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(argument_types[operator_index].push_back(system.get_type<Args>()), ...);
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operators.push_back(op.make_callable());
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}
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[[nodiscard]] inline type_system& get_typesystem()
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{
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return system;
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}
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void generate_tree();
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inline operator_id select_terminal(type_id id, std::mt19937_64& engine)
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{
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std::uniform_int_distribution<blt::size_t> dist(0, terminals[id].size() - 1);
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return terminals[id][dist(engine)];
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}
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inline operator_id select_non_terminal(type_id id, std::mt19937_64& engine)
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{
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std::uniform_int_distribution<blt::size_t> dist(0, non_terminals[id].size() - 1);
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return non_terminals[id][dist(engine)];
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}
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inline std::vector<type>& get_argument_types(operator_id id)
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{
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return argument_types[id];
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}
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private:
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type_system system;
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blt::gp::stack_allocator alloc;
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// indexed from return TYPE ID, returns index of operator
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blt::expanding_buffer<std::vector<operator_id>> terminals;
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blt::expanding_buffer<std::vector<operator_id>> non_terminals;
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// indexed from OPERATOR ID (operator number)
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blt::expanding_buffer<std::vector<type>> argument_types;
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std::vector<std::function<void(stack_allocator&)>> operators;
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};
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}
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#endif //BLT_GP_PROGRAM_H
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