file_concepts.hpp

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/* SPDX-FileCopyrightText: Copyright (c) 2022-2024 Oğuz Toraman <oguz.toraman@tutanota.com> */
/* SPDX-License-Identifier: LGPL-3.0-only */
 
#ifndef FILE_CONCEPTS_HPP
#define FILE_CONCEPTS_HPP
 
#include <filesystem>
 
#include "utility.hpp"
 
namespace file_concepts {
 
template <typename ContainerType>
concept file_container =
        requires (ContainerType c, std::filesystem::path p){
            c.push_back(p);
            c.empty();
            typename ContainerType::value_type;
        } &&
        std::ranges::range<ContainerType> &&
        std::default_initializable<ContainerType> &&
        std::same_as<typename ContainerType::value_type, std::filesystem::path>;
 
[[nodiscard]]
inline std::string to_string(const file_container auto& container, const std::string& separator = ", ")
{
    return utility::to_string(container, separator,
        [](const std::filesystem::path& path){
            return path.string();
        }
    );
}
 
} /* namespace file_concepts */
 
#endif /* FILE_CONCEPTS_HPP */