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// 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/detail/variadic/foldl1.hpp>
template <typename ...xs>
struct list { };
template <typename T>
struct basic_type { using type = T; };
template <typename T>
constexpr basic_type<T> type{};
template <typename F, typename State, typename ...Xs>
constexpr auto foldl(F f, State s, list<Xs...> xs)
{ return boost::hana::detail::variadic::foldl(f, s, type<Xs>...); }
//////////////////////////////////////////////////////////////////////////////
struct f {
template <typename ...>
struct result { };
template <typename X, typename Y>
constexpr auto operator()(X, Y) const
{ return result<X, Y>{}; }
};
template <int> struct x { };
struct state { };
int main() {
constexpr auto xs = list<
<%= (1..input_size).map { |i| "x<#{i}>" }.join(', ') %>
>{};
constexpr auto result = foldl(f{}, state{}, xs);
(void)result;
}
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