test/std/input.output/iostream.format/output.streams/ostream.assign/move_assign.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++98, c++03

// <ostream>

// template <class charT, class traits = char_traits<charT> >
// class basic_ostream;

// basic_ostream& operator=(basic_ostream&& rhs);

#include <ostream>
#include <cassert>

#include "test_macros.h"


template <class CharT>
struct testbuf
    : public std::basic_streambuf<CharT>
{
    testbuf() {}
};

template <class CharT>
struct test_ostream
    : public std::basic_ostream<CharT>
{
    typedef std::basic_ostream<CharT> base;
    test_ostream(testbuf<CharT>* sb) : base(sb) {}

    test_ostream& operator=(test_ostream&& s)
        {base::operator=(std::move(s)); return *this;}
};


int main(int, char**)
{
    {
        testbuf<char> sb1;
        testbuf<char> sb2;
        test_ostream<char> os1(&sb1);
        test_ostream<char> os2(&sb2);
        os2 = (std::move(os1));
        assert(os1.rdbuf() == &sb1);
        assert(os1.tie() == 0);
        assert(os1.fill() == ' ');
        assert(os1.rdstate() == os1.goodbit);
        assert(os1.exceptions() == os1.goodbit);
        assert(os1.flags() == (os1.skipws | os1.dec));
        assert(os1.precision() == 6);
        assert(os1.getloc().name() == "C");
        assert(os2.rdbuf() == &sb2);
        assert(os2.tie() == 0);
        assert(os2.fill() == ' ');
        assert(os2.rdstate() == os2.goodbit);
        assert(os2.exceptions() == os2.goodbit);
        assert(os2.flags() == (os2.skipws | os2.dec));
        assert(os2.precision() == 6);
        assert(os2.getloc().name() == "C");
    }
    {
        testbuf<wchar_t> sb1;
        testbuf<wchar_t> sb2;
        test_ostream<wchar_t> os1(&sb1);
        test_ostream<wchar_t> os2(&sb2);
        os2 = (std::move(os1));
        assert(os1.rdbuf() == &sb1);
        assert(os1.tie() == 0);
        assert(os1.fill() == ' ');
        assert(os1.rdstate() == os1.goodbit);
        assert(os1.exceptions() == os1.goodbit);
        assert(os1.flags() == (os1.skipws | os1.dec));
        assert(os1.precision() == 6);
        assert(os1.getloc().name() == "C");
        assert(os2.rdbuf() == &sb2);
        assert(os2.tie() == 0);
        assert(os2.fill() == ' ');
        assert(os2.rdstate() == os2.goodbit);
        assert(os2.exceptions() == os2.goodbit);
        assert(os2.flags() == (os2.skipws | os2.dec));
        assert(os2.precision() == 6);
        assert(os2.getloc().name() == "C");
    }

  return 0;
}