1#ifndef BOOST_HASH_IS_TUPLE_LIKE_HPP_INCLUDED
2#define BOOST_HASH_IS_TUPLE_LIKE_HPP_INCLUDED
3
4// Copyright 2017, 2022 Peter Dimov.
5// Distributed under the Boost Software License, Version 1.0.
6// https://www.boost.org/LICENSE_1_0.txt
7
8#include <boost/type_traits/integral_constant.hpp>
9#include <boost/config.hpp>
10#include <boost/config/workaround.hpp>
11#include <utility>
12
13namespace boost
14{
15namespace hash_detail
16{
17
18template<class T, class E = true_type> struct is_tuple_like_: false_type
19{
20};
21
22#if !defined(BOOST_NO_CXX11_HDR_TUPLE) && !BOOST_WORKAROUND(BOOST_MSVC, <= 1800)
23
24template<class T> struct is_tuple_like_<T, integral_constant<bool, std::tuple_size<T>::value == std::tuple_size<T>::value> >: true_type
25{
26};
27
28#endif
29
30} // namespace hash_detail
31
32namespace container_hash
33{
34
35template<class T> struct is_tuple_like: hash_detail::is_tuple_like_<T>
36{
37};
38
39} // namespace container_hash
40} // namespace boost
41
42#endif // #ifndef BOOST_HASH_IS_TUPLE_LIKE_HPP_INCLUDED
43