fc4486c247
Summary: The resolution of LWG 3199 makes sure that input-streaming into an empty bitset does not set the failbit on the input stream. Reviewers: mclow.lists, EricWF Subscribers: christof, jkorous, dexonsmith, libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D65105 llvm-svn: 369422
81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// test:
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// template <class charT, class traits, size_t N>
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// basic_istream<charT, traits>&
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// operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
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#include <bitset>
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#include <sstream>
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#include <cassert>
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#include "test_macros.h"
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int main(int, char**)
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{
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{
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std::istringstream in("01011010");
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std::bitset<8> b;
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in >> b;
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assert(b.to_ulong() == 0x5A);
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}
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{
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// Make sure that input-streaming an empty bitset does not cause the
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// failbit to be set (LWG 3199).
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std::istringstream in("01011010");
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std::bitset<0> b;
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in >> b;
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assert(b.to_string() == "");
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assert(!in.bad());
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assert(!in.fail());
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assert(!in.eof());
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assert(in.good());
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}
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#ifndef TEST_HAS_NO_EXCEPTIONS
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{
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std::stringbuf sb;
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std::istream is(&sb);
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is.exceptions(std::ios::failbit);
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bool threw = false;
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try {
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std::bitset<8> b;
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is >> b;
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} catch (std::ios::failure const&) {
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threw = true;
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}
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assert(!is.bad());
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assert(is.fail());
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assert(is.eof());
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assert(threw);
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}
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{
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std::stringbuf sb;
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std::istream is(&sb);
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is.exceptions(std::ios::eofbit);
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bool threw = false;
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try {
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std::bitset<8> b;
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is >> b;
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} catch (std::ios::failure const&) {
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threw = true;
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}
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assert(!is.bad());
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assert(is.fail());
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assert(is.eof());
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assert(threw);
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}
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#endif // TEST_HAS_NO_EXCEPTIONS
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return 0;
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}
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