50 lines
1.4 KiB
C++
50 lines
1.4 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/ext/boost/mpl/list.hpp>
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#include <boost/hana/assert.hpp>
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#include <boost/hana/core/to.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/type.hpp>
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#include <support/seq.hpp>
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#include <boost/mpl/list.hpp>
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namespace hana = boost::hana;
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namespace mpl = boost::mpl;
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struct t1; struct t2; struct t3; struct t4;
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int main() {
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// Conversion from any `Foldable` containing `type`s
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auto foldable = ::seq;
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auto to_list = hana::to<hana::ext::boost::mpl::list_tag>;
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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to_list(foldable()),
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mpl::list<>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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to_list(foldable(hana::type_c<t1>)),
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mpl::list<t1>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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to_list(foldable(hana::type_c<t1>, hana::type_c<t2>)),
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mpl::list<t1, t2>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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to_list(foldable(hana::type_c<t1>, hana::type_c<t2>, hana::type_c<t3>)),
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mpl::list<t1, t2, t3>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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to_list(foldable(hana::type_c<t1>, hana::type_c<t2>, hana::type_c<t3>, hana::type_c<t4>)),
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mpl::list<t1, t2, t3, t4>{}
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));
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}
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