ceph/src/boost/boost/atomic/detail/type_traits/is_nothrow_default_constructible.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2021 Andrey Semashev
   7  */
   8 /*!
   9  * \file   atomic/detail/type_traits/is_nothrow_default_constructible.hpp
  10  *
  11  * This header defines \c is_nothrow_default_constructible type trait
  12  */
  13
  14 #ifndef BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_NOTHROW_DEFAULT_CONSTRUCTIBLE_HPP_INCLUDED_
  15 #define BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_NOTHROW_DEFAULT_CONSTRUCTIBLE_HPP_INCLUDED_
  16
  17 #include <boost/atomic/detail/config.hpp>
  18 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  19 #include <type_traits>
  20 #else
  21 #include <boost/type_traits/has_nothrow_constructor.hpp>
  22 #endif
  23
  24 #ifdef BOOST_HAS_PRAGMA_ONCE
  25 #pragma once
  26 #endif
  27
  28 namespace boost {
  29 namespace atomics {
  30 namespace detail {
  31
  32 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  33 using std::is_nothrow_default_constructible;
  34 #elif !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
  35 template< typename T >
  36 using is_nothrow_default_constructible = boost::has_nothrow_constructor< T >;
  37 #else
  38 template< typename T >
  39 struct is_nothrow_default_constructible : public boost::has_nothrow_constructor< T > {};
  40 #endif
  41
  42 } // namespace detail
  43 } // namespace atomics
  44 } // namespace boost
  45
  46 #endif // BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_NOTHROW_DEFAULT_CONSTRUCTIBLE_HPP_INCLUDED_