1 // Copyright Louis Dionne 2013-2017
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/length.hpp>
8 #include <boost/hana/minimum.hpp>
9 #include <boost/hana/ordering.hpp>
10 #include <boost/hana/tuple.hpp>
11 namespace hana = boost::hana;
12 
13 
main()14 int main() {
15     BOOST_HANA_CONSTANT_CHECK(
16         hana::minimum.by(hana::ordering(hana::length), hana::make_tuple(
17             hana::make_tuple(),
18             hana::make_tuple(1, '2'),
19             hana::make_tuple(3.3, nullptr, 4)
20         ))
21         == hana::make_tuple()
22     );
23 }
24