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32 lines
1016 B
C++
32 lines
1016 B
C++
/*
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@copyright Louis Dionne 2014
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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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*/
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#include <boost/hana/map.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/minimal/comparable.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/list/instance.hpp>
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#include <boost/hana/pair/instance.hpp>
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using namespace boost::hana;
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template <int i>
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constexpr auto key = detail::minimal::comparable<>(i);
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template <int i>
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constexpr auto value = detail::minimal::comparable<>(i + 100);
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template <int i, int j>
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BOOST_HANA_CONSTEXPR_LAMBDA auto p = pair(key<i>, value<j>);
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int main() {
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BOOST_HANA_STATIC_ASSERT(keys(map()) == list());
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BOOST_HANA_STATIC_ASSERT(keys(map(p<1, 1>)) == list(key<1>));
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BOOST_HANA_STATIC_ASSERT(keys(map(p<1, 1>, p<2, 2>)) == list(key<1>, key<2>));
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BOOST_HANA_STATIC_ASSERT(keys(map(p<1, 1>, p<2, 2>, p<3, 3>)) == list(key<1>, key<2>, key<3>));
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}
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