hana/example/maximum_by.cpp
2017-01-07 14:14:18 -08:00

23 lines
669 B
C++

// Copyright Louis Dionne 2013-2017
// 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/equal.hpp>
#include <boost/hana/length.hpp>
#include <boost/hana/maximum.hpp>
#include <boost/hana/ordering.hpp>
#include <boost/hana/tuple.hpp>
namespace hana = boost::hana;
int main() {
static_assert(
hana::maximum.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(3.3, nullptr, 4)
, "");
}