Method resize

src/streams.h:239–239

    size_type size() const                           { return vch.size() - m_read_pos; }
    bool empty() const                               { return vch.size() == m_read_pos; }
    void resize(size_type n, value_type c = value_type{}) { vch.resize(n + m_read_pos, c); }
    void reserve(size_type n)                        { vch.reserve(n + m_read_pos); }
    const_reference operator[](size_type pos) const  { return vch[pos + m_read_pos]; }
    reference operator[](size_type pos)              { return vch[pos + m_read_pos]; }