Method filename

src/fs.h:57–57

    // See https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=96e0367ead5d8dcac3bec2865582e76e2fbab190
    path& make_preferred() { std::filesystem::path::make_preferred(); return *this; }
    path filename() const { return std::filesystem::path::filename(); }
};

// Disallow implicit std::string conversion for absolute to avoid