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#ifndef _LIBCPP___LIBCXX_DEBUG_RANDOMIZE_RANGE_H
10#define _LIBCPP___LIBCXX_DEBUG_RANDOMIZE_RANGE_H
11
12#include <__config>
13
14#ifdef _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY
15#  include <__algorithm/shuffle.h>
16#  include <__type_traits/is_constant_evaluated.h>
17#endif
18
19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20#  pragma GCC system_header
21#endif
22
23_LIBCPP_BEGIN_NAMESPACE_STD
24
25template <class _AlgPolicy, class _Iterator, class _Sentinel>
26_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __debug_randomize_range(_Iterator __first, _Sentinel __last) {
27#ifdef _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY
28#  ifdef _LIBCPP_CXX03_LANG
29#    error Support for unspecified stability is only for C++11 and higher
30#  endif
31
32  if (!__libcpp_is_constant_evaluated())
33    std::__shuffle<_AlgPolicy>(__first, __last, __libcpp_debug_randomizer());
34#else
35  (void)__first;
36  (void)__last;
37#endif
38}
39
40_LIBCPP_END_NAMESPACE_STD
41
42#endif // _LIBCPP___LIBCXX_DEBUG_RANDOMIZE_RANGE_H