a7f9895cc1
Since those features are general properties of the environment, it makes sense to use them from libc++abi too, and so the name libcpp-has-no-xxx doesn't make sense. Differential Revision: https://reviews.llvm.org/D126482
31 lines
736 B
C++
31 lines
736 B
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: no-random-device
|
|
|
|
// <random>
|
|
|
|
// class random_device;
|
|
|
|
// double entropy() const;
|
|
|
|
#include <random>
|
|
#include <cassert>
|
|
#include <climits>
|
|
|
|
#include "test_macros.h"
|
|
|
|
int main(int, char**) {
|
|
std::random_device r;
|
|
double e = r.entropy();
|
|
assert(e >= 0);
|
|
assert(e <= sizeof(typename std::random_device::result_type) * CHAR_BIT);
|
|
|
|
return 0;
|
|
}
|