is_seed_sequence.h 1.0 KB

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  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. #ifndef _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
  9. #define _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H
  10. #include <__config>
  11. #include <__type_traits/is_convertible.h>
  12. #include <__type_traits/is_same.h>
  13. #include <__type_traits/remove_cv.h>
  14. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  15. # pragma GCC system_header
  16. #endif
  17. _LIBCPP_BEGIN_NAMESPACE_STD
  18. template <class _Sseq, class _Engine>
  19. struct __is_seed_sequence
  20. {
  21. static _LIBCPP_CONSTEXPR const bool value =
  22. !is_convertible<_Sseq, typename _Engine::result_type>::value &&
  23. !is_same<__remove_cv_t<_Sseq>, _Engine>::value;
  24. };
  25. _LIBCPP_END_NAMESPACE_STD
  26. #endif // _LIBCPP___RANDOM_IS_SEED_SEQUENCE_H