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-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <ios>
10
11 // template <class charT, class traits> class basic_ios
12
13 // operator unspecified-bool-type() const;
14
15 #include <ios>
16 #include <type_traits>
17 #include <cassert>
18
19 #include "test_macros.h"
20
main(int,char **)21 int main(int, char**)
22 {
23 std::ios ios(0);
24 assert(static_cast<bool>(ios) == !ios.fail());
25 ios.setstate(std::ios::failbit);
26 assert(static_cast<bool>(ios) == !ios.fail());
27 static_assert((!std::is_convertible<std::ios, int>::value), "");
28 static_assert((!std::is_convertible<std::ios const&, int>::value), "");
29 #if TEST_STD_VER >= 11
30 static_assert(!std::is_convertible<std::ios, void*>::value, "");
31 static_assert(!std::is_convertible<std::ios, bool>::value, "");
32 #else
33 static_assert(std::is_convertible<std::ios, void*>::value, "");
34 static_assert(std::is_convertible<std::ios, bool>::value, "");
35 (void)(ios == 0); // SPEC2006 apparently relies on this to compile
36 #endif
37
38 return 0;
39 }
40