| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <random> |
| |
| // class seed_seq; |
| |
| // template<class InputIterator> |
| // seed_seq(InputIterator begin, InputIterator end); |
| |
| #include <random> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| void test() |
| { |
| { |
| unsigned a[5] = {5, 4, 3, 2, 1}; |
| std::seed_seq s(a, a+5); |
| assert(s.size() == 5); |
| |
| unsigned b[5] = {0}; |
| s.param(b); |
| assert(b[0] == 5); |
| assert(b[1] == 4); |
| assert(b[2] == 3); |
| assert(b[3] == 2); |
| assert(b[4] == 1); |
| } |
| { |
| // Test truncation to 32 bits |
| unsigned long long a[4] = { |
| 0x1234000056780000uLL, |
| 0x0000001234567800uLL, |
| 0xFFFFFFFFFFFFFFFFuLL, |
| 0x0000000180000000uLL, |
| }; |
| std::seed_seq s(a, a+4); |
| assert(s.size() == 4); |
| |
| unsigned b[4] = {0}; |
| s.param(b); |
| assert(b[0] == 0x56780000u); |
| assert(b[1] == 0x34567800u); |
| assert(b[2] == 0xFFFFFFFFu); |
| assert(b[3] == 0x80000000u); |
| } |
| #if TEST_STD_VER >= 11 |
| { |
| // Test uniform initialization syntax (LWG 3422) |
| unsigned a[3] = {1, 2, 3}; |
| std::seed_seq s{a, a+3}; // uniform initialization |
| assert(s.size() == 3); |
| |
| unsigned b[3] = {0}; |
| s.param(b); |
| assert(b[0] == 1); |
| assert(b[1] == 2); |
| assert(b[2] == 3); |
| } |
| #endif // TEST_STD_VER >= 11 |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| |
| return 0; |
| } |