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 
25 template <class _AlgPolicy, class _Iterator, class _Sentinel>
__debug_randomize_range(_Iterator __first,_Sentinel __last)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
43