Method insert

src/streams.h:245–245

    reference operator[](size_type pos)              { return vch[pos + nReadPos]; }
    void clear()                                     { vch.clear(); nReadPos = 0; }
    iterator insert(iterator it, const char x=char()) { return vch.insert(it, x); }
    void insert(iterator it, size_type n, const char x) { vch.insert(it, n, x); }
    value_type* data()                               { return vch.data() + nReadPos; }
    const value_type* data() const                   { return vch.data() + nReadPos; }