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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/at_key.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/find.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/map.hpp>
- #include <boost/hana/optional.hpp>
- #include <boost/hana/pair.hpp>
- #include <boost/hana/type.hpp>
- namespace hana = boost::hana;
- constexpr auto m = hana::make_map(
- hana::make_pair(hana::type_c<int>, 'i'),
- hana::make_pair(hana::type_c<float>, 'f')
- );
- static_assert(hana::find(m, hana::type_c<int>) == hana::just('i'), "");
- static_assert(hana::find(m, hana::type_c<float>) == hana::just('f'), "");
- BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::type_c<void>) == hana::nothing);
- BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::int_c<3>) == hana::nothing);
- // operator[] is equivalent to at_key
- static_assert(m[hana::type_c<int>] == 'i', "");
- static_assert(m[hana::type_c<float>] == 'f', "");
- int main() { }
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