| 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 | // UNSUPPORTED: no-random-device |
| 10 | |
| 11 | // <random> |
| 12 | |
| 13 | // class random_device; |
| 14 | |
| 15 | // result_type operator()(); |
| 16 | |
| 17 | #include <random> |
| 18 | #include <cassert> |
| 19 | #include <string> |
| 20 | #include <system_error> |
| 21 | |
| 22 | #include "test_macros.h" |
| 23 | |
| 24 | int main(int, char**) |
| 25 | { |
| 26 | { |
| 27 | std::random_device r; |
| 28 | std::random_device::result_type e = r(); |
| 29 | ((void)e); // Prevent unused warning |
| 30 | } |
| 31 | |
| 32 | // When using the `/dev/urandom` implementation, make sure that we throw |
| 33 | // an exception when we hit EOF while reading the custom-provided file. |
| 34 | #if !defined(TEST_HAS_NO_EXCEPTIONS) && defined(_LIBCPP_USING_DEV_RANDOM) |
| 35 | { |
| 36 | std::random_device r("/dev/null" ); |
| 37 | try { |
| 38 | (void)r(); |
| 39 | LIBCPP_ASSERT(false); |
| 40 | } catch (const std::system_error&) { |
| 41 | } |
| 42 | } |
| 43 | #endif |
| 44 | |
| 45 | return 0; |
| 46 | } |
| 47 | |