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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/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/flatten.hpp>
#include <boost/hana/optional.hpp>
#include <boost/hana/tuple.hpp>
namespace hana = boost::hana;
static_assert(
hana::flatten(hana::make_tuple(hana::make_tuple(1, 2, 3),
hana::make_tuple(4, 5),
hana::make_tuple(6, 7, 8, 9)))
==
hana::make_tuple(1, 2, 3, 4, 5, 6, 7, 8, 9)
, "");
BOOST_HANA_CONSTANT_CHECK(hana::flatten(hana::nothing) == hana::nothing);
static_assert(hana::flatten(hana::just(hana::just(1))) == hana::just(1), "");
BOOST_HANA_CONSTANT_CHECK(hana::flatten(hana::just(hana::nothing)) == hana::nothing);
int main() { }
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