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arangodb/3rdParty/boost/1.62.0/libs/hana/example/minimum_by.cpp

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// Copyright Louis Dionne 2013-2016
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/length.hpp>
#include <boost/hana/minimum.hpp>
#include <boost/hana/ordering.hpp>
#include <boost/hana/tuple.hpp>
namespace hana = boost::hana;
int main() {
BOOST_HANA_CONSTANT_CHECK(
hana::minimum.by(hana::ordering(hana::length), hana::make_tuple(
hana::make_tuple(),
hana::make_tuple(1, '2'),
hana::make_tuple(3.3, nullptr, 4)
))
== hana::make_tuple()
);
}