1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <ios>
11 
12 // class ios_base::failure
13 
14 // explicit failure(const char* msg, const error_code& ec = io_errc::stream);
15 
16 #include <ios>
17 #include <string>
18 #include <cassert>
19 
main()20 int main()
21 {
22     {
23         std::string what_arg("io test message");
24         std::ios_base::failure se(what_arg.c_str(), make_error_code(std::errc::is_a_directory));
25         assert(se.code() == std::make_error_code(std::errc::is_a_directory));
26         std::string what_message(se.what());
27         assert(what_message.find(what_arg) != std::string::npos);
28         assert(what_message.find("Is a directory") != std::string::npos);
29     }
30     {
31         std::string what_arg("io test message");
32         std::ios_base::failure se(what_arg.c_str());
33         assert(se.code() == std::make_error_code(std::io_errc::stream));
34         std::string what_message(se.what());
35         assert(what_message.find(what_arg) != std::string::npos);
36         assert(what_message.find(std::iostream_category().message(static_cast<int>
37             (std::io_errc::stream))) != std::string::npos);
38     }
39 }
40