v1/__random/is_seed_sequence.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
0010 #define _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
0011
0012 #include <__config>
0013 #include <__type_traits/is_convertible.h>
0014 #include <__type_traits/is_same.h>
0015 #include <__type_traits/remove_cv.h>
0016
0017 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0018 #  pragma GCC system_header
0019 #endif
0020
0021 _LIBCPP_BEGIN_NAMESPACE_STD
0022
0023 template <class _Sseq, class _Engine>
0024 struct __is_seed_sequence {
0025   static _LIBCPP_CONSTEXPR const bool value =
0026       !is_convertible<_Sseq, typename _Engine::result_type>::value && !is_same<__remove_cv_t<_Sseq>, _Engine>::value;
0027 };
0028
0029 _LIBCPP_END_NAMESPACE_STD
0030
0031 #endif // _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H