mutable_computed.hpp

/*
 * live_cells_cpp
 * Copyright (C) 2024  Alexander Gutev <alex.gutev@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You
 * may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
 
#ifndef LIVE_CELLS_MUTABLE_COMPUTED_HPP
#define LIVE_CELLS_MUTABLE_COMPUTED_HPP
 
#include <tuple>
#include <utility>
#include <concepts>
 
#include "static_mutable_compute_cell.hpp"
#include "dynamic_mutable_compute_cell.hpp"
#include "util.hpp"
 
namespace live_cells {
    template <std::invocable F, typename R>
    auto mutable_computed(F&& fn, R&& reverse) {
        return dynamic_mutable_compute_cell<F,R>(
            std::forward<F>(fn),
            std::forward<R>(reverse)
        );
    }
 
    template <std::invocable F, typename R>
    auto mutable_computed(changes_only_option option, F&& fn, R&& reverse) {
        return dynamic_mutable_compute_cell<F,R, dynamic_mutable_compute_changes_only_cell_state<F,R>>(
            std::forward<F>(fn),
            std::forward<R>(reverse)
        );
    }
 
    template <typename A1, typename A2, typename... As>
    auto mutable_computed(A1 arg1, A2 arg2, As... args) {
        auto packed = internal::pack<2>(arg1, arg2, args...);
 
        auto fn_args = std::get<0>(packed);
        auto compute = std::get<1>(packed);
        auto reverse = std::get<2>(packed);
 
        return std::apply([&] (auto... args) {
            auto fn = [=] {
                return compute(args.value()...);
            };
 
            return make_mutable_compute_cell(fn, reverse, args...);
        }, fn_args);
    }
 
    template <typename A1, typename A2, typename... As>
    auto mutable_computed(changes_only_option option, A1 arg1, A2 arg2, As... args) {
        auto packed = internal::pack<2>(arg1, arg2, args...);
 
        auto fn_args = std::get<0>(packed);
        auto compute = std::get<1>(packed);
        auto reverse = std::get<2>(packed);
 
        return std::apply([&] (auto... args) {
            auto fn = [=] {
                return compute(args.value()...);
            };
 
            return make_mutable_compute_cell(changes_only, fn, reverse, args...);
        }, fn_args);
    }
 
}  // live_cells
 
#endif /* LIVE_CELLS_MUTABLE_COMPUTED_HPP */