1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <ios> 11 12// template <class charT, class traits> class basic_ios 13 14// bool operator!() const; 15 16#include <ios> 17#include <cassert> 18 19int main() 20{ 21 std::ios ios(0); 22 assert(!ios == ios.fail()); 23 ios.setstate(std::ios::failbit); 24 assert(!ios == ios.fail()); 25} 26