ode_equation_solver.h

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/*
 * Copyright 2021 MusicScience37 (Kenta Kabashima)
 *
 * 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.
 */
#pragma once
 
#include <type_traits>  // IWYU pragma: keep
 
#include "num_collect/base/concepts/const_reference_of.h"
#include "num_collect/base/concepts/iterative_solver.h"
#include "num_collect/ode/concepts/problem.h"
#include "num_collect/ode/error_tolerances.h"
 
namespace num_collect::ode::concepts {

template <typename T>
concept ode_equation_solver =
    base::concepts::iterative_solver<T> && requires() {
        typename T::problem_type;
        requires problem<typename T::problem_type>;
 
        typename T::variable_type;
        requires std::is_same_v<typename T::variable_type,
            typename T::problem_type::variable_type>;
 
        typename T::scalar_type;
        requires std::is_same_v<typename T::scalar_type,
            typename T::problem_type::scalar_type>;
 
        T();
 
        requires requires(
            T& obj, const error_tolerances<typename T::variable_type>& val) {
            obj.tolerances(val);
        };
 
        requires requires(const T& obj) {
            {
                obj.tolerances()
            } -> base::concepts::const_reference_of<
                error_tolerances<typename T::variable_type>>;
        };
    };
 
}  // namespace num_collect::ode::concepts