boost_1_45_0/libs/iostreams/example/container_device_example.cpp

// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2005-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)

// See http://www.boost.org/libs/iostreams for documentation.

#include <cassert>
#include <string>
#include <boost/iostreams/stream.hpp>
#include <boost/iostreams/detail/ios.hpp> // ios_base::beg.
#include <libs/iostreams/example/container_device.hpp>

namespace io = boost::iostreams;
namespace ex = boost::iostreams::example;

int main()
{
    using namespace std;
    typedef ex::container_device<string> string_device;

    string                     one, two;
    io::stream<string_device>  io(one);
    io << "Hello World!";
    io.flush();
    io.seekg(0, BOOST_IOS::beg);
    getline(io, two);
    assert(one == "Hello World!");
    assert(two == "Hello World!");
}