/* Copyright 2003-2019 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#ifndef BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
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#define BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/detail/workaround.hpp>
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#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)||\
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BOOST_WORKAROUND(_LIBCPP_VERSION,<30700)||\
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BOOST_WORKAROUND(BOOST_LIBSTDCXX_VERSION,<40802)
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/* libc++: std::is_function<void() const> fails,
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* https://bugs.llvm.org/show_bug.cgi?id=20084
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*
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* libstdc++-v3: std::is_function does not support ref-qualified function types,
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* https://github.com/gcc-mirror/gcc/commit/
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* 2fa630fb50ba29d8e891c52a75aaec261b07874e#
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* diff-6547f965a8d66bf35a6388fcf404aaa3
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*/
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#include <boost/type_traits/is_function.hpp>
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namespace boost{namespace multi_index{namespace detail{
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template<typename T>
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struct is_function:boost::is_function<T>{};
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}}} /* namespace boost::multi_index::detail */
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#else
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#include <type_traits>
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namespace boost{namespace multi_index{namespace detail{
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template<typename T>
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struct is_function:std::is_function<T>{};
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}}} /* namespace boost::multi_index::detail */
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#endif
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#endif
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