ceph/src/boost/boost/endian/detail/is_scoped_enum.hpp

   1 #ifndef BOOST_ENDIAN_DETAIL_IS_SCOPED_ENUM_HPP_INCLUDED
   2 #define BOOST_ENDIAN_DETAIL_IS_SCOPED_ENUM_HPP_INCLUDED
   3
   4 // Copyright 2020 Peter Dimov
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 // https://www.boost.org/LICENSE_1_0.txt
   8
   9 #include <boost/type_traits/conditional.hpp>
  10 #include <boost/type_traits/is_enum.hpp>
  11 #include <boost/type_traits/is_convertible.hpp>
  12
  13 namespace boost
  14 {
  15 namespace endian
  16 {
  17 namespace detail
  18 {
  19
  20 template<class T> struct negation: boost::integral_constant<bool, !T::value> {};
  21
  22 template<class T> struct is_scoped_enum:
  23     boost::conditional<
  24         boost::is_enum<T>::value,
  25         negation< boost::is_convertible<T, int> >,
  26         boost::false_type
  27     >::type
  28 {
  29 };
  30
  31 } // namespace detail
  32 } // namespace endian
  33 } // namespace boost
  34
  35 #endif  // BOOST_ENDIAN_DETAIL_IS_SCOPED_ENUM_HPP_INCLUDED