update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / boost / boost / atomic / detail / classify.hpp

diff --git a/ceph/src/boost/boost/atomic/detail/classify.hpp b/ceph/src/boost/boost/atomic/detail/classify.hpp
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+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2020 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/classify.hpp
+ *
+ * This header contains type traits for type classification.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_
+
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/type_traits/is_integral.hpp>
+#include <boost/atomic/detail/type_traits/is_function.hpp>
+#include <boost/atomic/detail/type_traits/is_floating_point.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+template< typename T, bool IsFunction = atomics::detail::is_function< T >::value >
+struct classify_pointer
+{
+    typedef void* type;
+};
+
+template< typename T >
+struct classify_pointer< T, true >
+{
+    typedef void type;
+};
+
+template< typename T, bool IsInt = atomics::detail::is_integral< T >::value, bool IsFloat = atomics::detail::is_floating_point< T >::value >
+struct classify
+{
+    typedef void type;
+};
+
+template< typename T >
+struct classify< T, true, false > { typedef int type; };
+
+#if !defined(BOOST_ATOMIC_NO_FLOATING_POINT)
+template< typename T >
+struct classify< T, false, true > { typedef float type; };
+#endif
+
+template< typename T >
+struct classify< T*, false, false > { typedef typename classify_pointer< T >::type type; };
+
+template< >
+struct classify< void*, false, false > { typedef void type; };
+
+template< >
+struct classify< const void*, false, false > { typedef void type; };
+
+template< >
+struct classify< volatile void*, false, false > { typedef void type; };
+
+template< >
+struct classify< const volatile void*, false, false > { typedef void type; };
+
+template< typename T, typename U >
+struct classify< T U::*, false, false > { typedef void type; };
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#endif // BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_