libcxx/include/__random/is_seed_sequence.h

   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