// 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/fold_left.hpp>
#include <boost/hana/basic_tuple.hpp>
namespace hana = boost::hana;


struct f {
    template <typename State, typename X>
    constexpr X operator()(State, X x) const { return x; }
};

struct state { };

template <int i>
struct x { };

int main() {
    constexpr auto tuple = hana::make_basic_tuple(
        <%= (1..input_size).map { |n| "x<#{n}>{}" }.join(', ') %>
    );
    constexpr auto result = hana::fold_left(tuple, state{}, f{});
    (void)result;
}