1 // Copyright Louis Dionne 2013-2017
2 // Distributed under the Boost Software License, Version 1.0.
3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
4 
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/at_key.hpp>
7 #include <boost/hana/integral_constant.hpp>
8 #include <boost/hana/map.hpp>
9 #include <boost/hana/pair.hpp>
10 #include <boost/hana/type.hpp>
11 
12 #include <string>
13 namespace hana = boost::hana;
14 
15 
main()16 int main() {
17     auto m = hana::make_map(
18         hana::make_pair(hana::type<int>{}, std::string{"int"}),
19         hana::make_pair(hana::int_<3>{}, std::string{"3"})
20     );
21 
22     BOOST_HANA_RUNTIME_CHECK(hana::at_key(m, hana::type<int>{}) == "int");
23 
24     // usage as operator[]
25     BOOST_HANA_RUNTIME_CHECK(m[hana::type<int>{}] == "int");
26     BOOST_HANA_RUNTIME_CHECK(m[hana::int_<3>{}] == "3");
27 }
28