39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/contains.hpp>
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#include <boost/hana/permutations.hpp>
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#include <boost/hana/set.hpp>
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#include <boost/hana/transform.hpp>
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#include <boost/hana/tuple.hpp>
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#include <boost/hana/unpack.hpp>
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#include <laws/base.hpp>
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namespace hana = boost::hana;
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using hana::test::ct_eq;
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int main() {
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hana::test::_injection<0> f{};
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auto check = [=](auto ...xs) {
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auto arg_perms = hana::permutations(hana::make_tuple(xs...));
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auto possible_results = hana::transform(arg_perms, [=](auto args) {
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return hana::unpack(args, f);
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});
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BOOST_HANA_CONSTANT_CHECK(hana::contains(
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possible_results,
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hana::unpack(hana::make_set(xs...), f)
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));
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};
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check();
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check(ct_eq<1>{});
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check(ct_eq<1>{}, ct_eq<2>{});
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check(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{});
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check(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{});
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}
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