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//===----------------------------------------------------------------------===//
//
// 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
// basic_streambuf<charT,traits>* rdbuf(basic_streambuf<charT,traits>* sb);
#include <ios>
#include <streambuf>
#include <cassert>
int main()
{
std::ios ios(0);
assert(ios.rdbuf() == 0);
assert(!ios.good());
std::streambuf* sb = (std::streambuf*)1;
std::streambuf* sb2 = ios.rdbuf(sb);
assert(sb2 == 0);
assert(ios.rdbuf() == sb);
assert(ios.good());
sb2 = ios.rdbuf(0);
assert(sb2 == (std::streambuf*)1);
assert(ios.rdbuf() == 0);
assert(ios.bad());
}
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