xref: /freebsd/contrib/llvm-project/libcxx/include/__random/is_seed_sequence.h (revision cb14a3fe5122c879eae1fb480ed7ce82a699ddb6)
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___RANDOM_IS_SEED_SEQUENCE_H
10  #define _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
11  
12  #include <__config>
13  #include <__type_traits/is_convertible.h>
14  #include <__type_traits/is_same.h>
15  #include <__type_traits/remove_cv.h>
16  
17  #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18  #  pragma GCC system_header
19  #endif
20  
21  _LIBCPP_BEGIN_NAMESPACE_STD
22  
23  template <class _Sseq, class _Engine>
24  struct __is_seed_sequence {
25    static _LIBCPP_CONSTEXPR const bool value =
26        !is_convertible<_Sseq, typename _Engine::result_type>::value && !is_same<__remove_cv_t<_Sseq>, _Engine>::value;
27  };
28  
29  _LIBCPP_END_NAMESPACE_STD
30  
31  #endif // _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
32