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 fail() const; 15 16 #include <ios> 17 #include <streambuf> 18 #include <cassert> 19 20 struct testbuf : public std::streambuf {}; 21 main()22int main() 23 { 24 { 25 std::ios ios(0); 26 assert(ios.fail()); 27 ios.setstate(std::ios::eofbit); 28 assert(ios.fail()); 29 } 30 { 31 testbuf sb; 32 std::ios ios(&sb); 33 assert(!ios.fail()); 34 ios.setstate(std::ios::eofbit); 35 assert(!ios.fail()); 36 ios.setstate(std::ios::badbit); 37 assert(ios.fail()); 38 ios.setstate(std::ios::failbit); 39 assert(ios.fail()); 40 } 41 } 42