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/erase_key.hpp>
7 #include <boost/hana/map.hpp>
8 #include <boost/hana/pair.hpp>
9 #include <boost/hana/string.hpp>
10 #include <boost/hana/type.hpp>
11
12 #include <string>
13 namespace hana = boost::hana;
14 using namespace std::literals;
15
16
main()17 int main() {
18 auto m = hana::make_map(
19 hana::make_pair(hana::type_c<int>, "abcd"s),
20 hana::make_pair(hana::type_c<void>, 1234),
21 hana::make_pair(BOOST_HANA_STRING("foobar!"), hana::type_c<char>)
22 );
23
24 BOOST_HANA_RUNTIME_CHECK(
25 hana::erase_key(m, BOOST_HANA_STRING("foobar!")) ==
26 hana::make_map(
27 hana::make_pair(hana::type_c<int>, "abcd"s),
28 hana::make_pair(hana::type_c<void>, 1234)
29 )
30 );
31
32 BOOST_HANA_RUNTIME_CHECK(hana::erase_key(m, hana::type_c<char>) == m);
33 }
34