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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/contains.hpp>
#include <boost/hana/permutations.hpp>
#include <boost/hana/set.hpp>
#include <boost/hana/transform.hpp>
#include <boost/hana/tuple.hpp>
#include <boost/hana/unpack.hpp>
#include <laws/base.hpp>
namespace hana = boost::hana;
using hana::test::ct_eq;
int main() {
hana::test::_injection<0> f{};
auto check = [=](auto ...xs) {
auto arg_perms = hana::permutations(hana::make_tuple(xs...));
auto possible_results = hana::transform(arg_perms, [=](auto args) {
return hana::unpack(args, f);
});
BOOST_HANA_CONSTANT_CHECK(hana::contains(
possible_results,
hana::unpack(hana::make_set(xs...), f)
));
};
check();
check(ct_eq<1>{});
check(ct_eq<1>{}, ct_eq<2>{});
check(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{});
check(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{});
}
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