1// Copyright Louis Dionne 2013-2022
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
4
5#include <boost/hana/assert.hpp>
6#include <boost/hana/equal.hpp>
7#include <boost/hana/ext/std/integer_sequence.hpp>
8#include <boost/hana/ext/std/integral_constant.hpp>
9#include <boost/hana/front.hpp>
10
11#include <type_traits>
12#include <utility>
13namespace hana = boost::hana;
14
15
16int main() {
17 BOOST_HANA_CONSTANT_CHECK(hana::equal(
18 hana::front(std::index_sequence<0>{}),
19 std::integral_constant<std::size_t, 0>{}
20 ));
21
22 BOOST_HANA_CONSTANT_CHECK(hana::equal(
23 hana::front(std::index_sequence<0, 1>{}),
24 std::integral_constant<std::size_t, 0>{}
25 ));
26
27 BOOST_HANA_CONSTANT_CHECK(hana::equal(
28 hana::front(std::integer_sequence<int, -3, 1, 2, 3, 4>{}),
29 std::integral_constant<int, -3>{}
30 ));
31}
32

source code of boost/libs/hana/test/ext/std/integer_sequence/front.cpp