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 main()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