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 
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, void*>::value), "");
28     static_assert((!std::is_convertible<std::ios, int>::value), "");
29     static_assert((!std::is_convertible<std::ios const&, int>::value), "");
30     static_assert((!std::is_convertible<std::ios, bool>::value), "");
31 
32   return 0;
33 }
34