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 // double entropy() const; 16 17 #include <random> 18 #include <cassert> 19 #include <climits> 20 21 #include "test_macros.h" 22 main(int,char **)23int main(int, char**) { 24 std::random_device r; 25 double e = r.entropy(); 26 assert(e >= 0); 27 assert(e <= sizeof(typename std::random_device::result_type) * CHAR_BIT); 28 29 return 0; 30 } 31