libcxx/test/std/iterators/stream.iterators/ostreambuf.iterator/ostreambuf.iter.ops/increment.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <iterator>

// class ostreambuf_iterator

// ostreambuf_iterator<charT,traits>& operator++();
// ostreambuf_iterator<charT,traits>& operator++(int);

#include <iterator>
#include <sstream>
#include <cassert>

int main()
{
    {
        std::ostringstream outf;
        std::ostreambuf_iterator<char> i(outf);
        std::ostreambuf_iterator<char>& iref = ++i;
        assert(&iref == &i);
        std::ostreambuf_iterator<char>& iref2 = i++;
        assert(&iref2 == &i);
    }
    {
        std::wostringstream outf;
        std::ostreambuf_iterator<wchar_t> i(outf);
        std::ostreambuf_iterator<wchar_t>& iref = ++i;
        assert(&iref == &i);
        std::ostreambuf_iterator<wchar_t>& iref2 = i++;
        assert(&iref2 == &i);
    }
}