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/basic_tuple.hpp>
7#include <boost/hana/equal.hpp>
8#include <boost/hana/integral_constant.hpp>
9#include <boost/hana/length.hpp>
10
11#include <laws/base.hpp>
12namespace hana = boost::hana;
13using hana::test::ct_eq;
14
15
16int main() {
17 BOOST_HANA_CONSTANT_CHECK(hana::equal(
18 hana::length(hana::make_basic_tuple()),
19 hana::size_c<0>
20 ));
21
22 BOOST_HANA_CONSTANT_CHECK(hana::equal(
23 hana::length(hana::make_basic_tuple(ct_eq<0>{})),
24 hana::size_c<1>
25 ));
26
27 BOOST_HANA_CONSTANT_CHECK(hana::equal(
28 hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{})),
29 hana::size_c<2>
30 ));
31
32 BOOST_HANA_CONSTANT_CHECK(hana::equal(
33 hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})),
34 hana::size_c<3>
35 ));
36
37 BOOST_HANA_CONSTANT_CHECK(hana::equal(
38 hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{})),
39 hana::size_c<4>
40 ));
41}
42

source code of boost/libs/hana/test/basic_tuple/length.cpp