c1a8f12873
efriedma noted that D104682 broke this test case, reduced from SPEC2006.
#include <istream>
bool a(std::istream a) {
return a.getline(0,0) == 0;
}
We can unbreak it by restoring the conversion to something-convertible-to-bool.
We chose `void*` in order to match libstdc++.
For more ancient history, see PR19460: https://bugs.llvm.org/show_bug.cgi?id=19460
Differential Revision: https://reviews.llvm.org/D107663
40 lines
1.3 KiB
C++
40 lines
1.3 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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// <ios>
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// template <class charT, class traits> class basic_ios
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// operator unspecified-bool-type() const;
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#include <ios>
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#include <type_traits>
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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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std::ios ios(0);
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assert(static_cast<bool>(ios) == !ios.fail());
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ios.setstate(std::ios::failbit);
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assert(static_cast<bool>(ios) == !ios.fail());
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static_assert((!std::is_convertible<std::ios, int>::value), "");
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static_assert((!std::is_convertible<std::ios const&, int>::value), "");
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#if TEST_STD_VER >= 11
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static_assert(!std::is_convertible<std::ios, void*>::value, "");
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static_assert(!std::is_convertible<std::ios, bool>::value, "");
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#else
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static_assert(std::is_convertible<std::ios, void*>::value, "");
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static_assert(std::is_convertible<std::ios, bool>::value, "");
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(void)(ios == 0); // SPEC2006 apparently relies on this to compile
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#endif
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return 0;
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}
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