1#ifndef BOOST_SYSTEM_DETAIL_ENABLE_IF_HPP_INCLUDED
2#define BOOST_SYSTEM_DETAIL_ENABLE_IF_HPP_INCLUDED
3
4// Copyright 2020 Peter Dimov
5// Distributed under the Boost Software License, Version 1.0
6// http://www.boost.org/LICENSE_1_0.txt
7
8#include <type_traits>
9
10namespace boost
11{
12namespace system
13{
14namespace detail
15{
16
17using std::enable_if;
18
19} // namespace detail
20} // namespace system
21} // namespace boost
22
23#endif // #ifndef BOOST_SYSTEM_DETAIL_ENABLE_IF_HPP_INCLUDED
24

source code of boost/libs/system/include/boost/system/detail/enable_if.hpp