45 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <ios>10 11// template <class charT, class traits> class basic_ios12 13// bool fail() const;14 15#include <ios>16#include <streambuf>17#include <cassert>18 19#include "test_macros.h"20 21struct testbuf : public std::streambuf {};22 23int main(int, char**)24{25 {26 std::ios ios(0);27 assert(ios.fail());28 ios.setstate(std::ios::eofbit);29 assert(ios.fail());30 }31 {32 testbuf sb;33 std::ios ios(&sb);34 assert(!ios.fail());35 ios.setstate(std::ios::eofbit);36 assert(!ios.fail());37 ios.setstate(std::ios::badbit);38 assert(ios.fail());39 ios.setstate(std::ios::failbit);40 assert(ios.fail());41 }42 43 return 0;44}45