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 { 26 static _LIBCPP_CONSTEXPR const bool value = 27 !is_convertible<_Sseq, typename _Engine::result_type>::value && 28 !is_same<__remove_cv_t<_Sseq>, _Engine>::value; 29 }; 30 31 _LIBCPP_END_NAMESPACE_STD 32 33 #endif // _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H 34