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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>
// class ios_base
// ios_base& nounitbuf(ios_base& str);
#include <ios>
#include <streambuf>
#include <cassert>
struct testbuf : public std::streambuf {};
int main()
{
testbuf sb;
std::ios ios(&sb);
std::unitbuf(ios);
std::ios_base& r = std::nounitbuf(ios);
assert(&r == &ios);
assert(!(ios.flags() & std::ios::unitbuf));
}