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 // See https://llvm.org/PR20183
10 //
11 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}}
12 
13 // UNSUPPORTED: libcpp-has-no-random-device
14 
15 // <random>
16 
17 // class random_device;
18 
19 // result_type operator()();
20 
21 #include <random>
22 #include <cassert>
23 #include <system_error>
24 
25 #include "test_macros.h"
26 
27 int main(int, char**)
28 {
29     {
30         std::random_device r;
31         std::random_device::result_type e = r();
32         ((void)e); // Prevent unused warning
33     }
34 
35 #ifndef TEST_HAS_NO_EXCEPTIONS
36     try
37     {
38         std::random_device r("/dev/null");
39         (void)r();
40         LIBCPP_ASSERT(false);
41     }
42     catch (const std::system_error&)
43     {
44     }
45 #endif
46 
47   return 0;
48 }
49