Function commit

include/boost/beast/core/flat_buffer.hpp:484–488

Append writable bytes to the readable bytes. Appends n bytes from the start of the writable bytes to the end of the readable bytes. The remainder of the writable bytes are discarded. If n is greater than the number of writable bytes, all writable bytes are appended to the readable bytes. All buffers sequences previously obtained using @ref data or

        No-throw guarantee.
    */
    void
    commit(std::size_t n) noexcept
    {
        out_ += (std::min)(n, dist(out_, last_));
    }

    /** Remove bytes from beginning of the readable bytes.