rc1/test/std/input.output/iostreams.base/ios/basic.ios.cons/ctor_streambuf.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.
//
//===----------------------------------------------------------------------===//

// <ios>

// template <class charT, class traits> class basic_ios

// explicit basic_ios(basic_streambuf<charT,traits>* sb);

#include <ios>
#include <streambuf>
#include <cassert>

int main()
{
    {
        std::streambuf* sb = 0;
        std::basic_ios<char> ios(sb);
        assert(ios.rdbuf() == sb);
        assert(ios.tie() == 0);
        assert(ios.rdstate() == std::ios::badbit);
        assert(ios.exceptions() == std::ios::goodbit);
        assert(ios.flags() == (std::ios::skipws | std::ios::dec));
        assert(ios.width() == 0);
        assert(ios.precision() == 6);
        assert(ios.fill() == ' ');
        assert(ios.getloc() == std::locale());
    }
    {
        std::streambuf* sb = (std::streambuf*)1;
        std::basic_ios<char> ios(sb);
        assert(ios.rdbuf() == sb);
        assert(ios.tie() == 0);
        assert(ios.rdstate() == std::ios::goodbit);
        assert(ios.exceptions() == std::ios::goodbit);
        assert(ios.flags() == (std::ios::skipws | std::ios::dec));
        assert(ios.width() == 0);
        assert(ios.precision() == 6);
        assert(ios.fill() == ' ');
        assert(ios.getloc() == std::locale());
    }
}