1/* Copyright 2003-2019 Joaquin M Lopez Munoz.
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 * See http://www.boost.org/libs/multi_index for library home page.
7 */
8
9#ifndef BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
10#define BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
11
12#if defined(_MSC_VER)
13#pragma once
14#endif
15
16#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
17#include <boost/detail/workaround.hpp>
18
19#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)||\
20 BOOST_WORKAROUND(_LIBCPP_VERSION,<30700)||\
21 BOOST_WORKAROUND(BOOST_LIBSTDCXX_VERSION,<40802)
22/* libc++: std::is_function<void() const> fails,
23 * https://bugs.llvm.org/show_bug.cgi?id=20084
24 *
25 * libstdc++-v3: std::is_function does not support ref-qualified function types,
26 * https://github.com/gcc-mirror/gcc/commit/
27 * 2fa630fb50ba29d8e891c52a75aaec261b07874e#
28 * diff-6547f965a8d66bf35a6388fcf404aaa3
29 */
30
31#include <boost/type_traits/is_function.hpp>
32
33namespace boost{namespace multi_index{namespace detail{
34
35template<typename T>
36struct is_function:boost::is_function<T>{};
37
38}}} /* namespace boost::multi_index::detail */
39
40#else
41
42#include <type_traits>
43
44namespace boost{namespace multi_index{namespace detail{
45
46template<typename T>
47struct is_function:std::is_function<T>{};
48
49}}} /* namespace boost::multi_index::detail */
50
51#endif
52#endif
53

source code of boost/libs/multi_index/include/boost/multi_index/detail/is_function.hpp