Method ~small_array

include/boost/filesystem/cstdio.hpp:45–49

        small_array() noexcept : p(buf) {}
        ~small_array() noexcept
        {
            if (BOOST_UNLIKELY(p != buf))
                std::free(p);
        }
    }
    wmode;
    std::size_t wmode_len = std::mbstowcs(wmode.p, mode, sizeof(wmode.buf) / sizeof(wchar_t));