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_COMPUTED_HPP
#define LIVE_CELLS_COMPUTED_HPP
 
#include <tuple>
#include <utility>
 
#include "compute_cell.hpp"
#include "dynamic_compute_cell.hpp"
#include "exceptions.hpp"
#include "util.hpp"
 
namespace live_cells {
 
    template <std::invocable F>
    auto computed(F&& compute) {
        return dynamic_compute_cell<F>(std::forward<F>(compute));
    }
 
    template <std::invocable F>
    auto computed(changes_only_option option, F&& compute) {
        return dynamic_compute_cell<F, dynamic_compute_changes_only_cell_state<F>>(
            std::forward<F>(compute)
        );
    }
 
    template <std::invocable F>
    auto computed(key_ref key, F&& compute) {
        return dynamic_compute_cell<F>(key, std::forward<F>(compute));
    }
 
    template <std::invocable F>
    auto computed(changes_only_option option, key_ref key, F&& compute) {
        return dynamic_compute_cell<F, dynamic_compute_changes_only_cell_state<F>>(
            key,
            std::forward<F>(compute)
        );
    }
 
    template <typename A, typename... As>
    auto computed(A arg1, As... args) {
        auto packed = internal::pack<1>(arg1, args...);
 
        auto fn_args = std::get<0>(packed);
        auto fn = std::get<1>(packed);
 
        return std::apply([&] (auto... args) {
            auto f = [=] {
                return fn(args.value()...);
            };
 
            return make_compute_cell(f, args...);
        }, fn_args);
    }
 
    template <typename A, typename... As>
    auto computed(key_ref key, A arg1, As... args) {
        auto packed = internal::pack<1>(arg1, args...);
 
        auto fn_args = std::get<0>(packed);
        auto fn = std::get<1>(packed);
 
        return std::apply([&] (auto... args) {
            auto f = [=] {
                return fn(args.value()...);
            };
 
            return make_compute_cell(key, f, args...);
        }, fn_args);
    }
 
    inline void none() {
        throw stop_compute_exception();
    }
 
}  // live_cells
 
#endif /* LIVE_CELLS_COMPUTED_HPP */