// 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/difference.hpp> #include <boost/hana/equal.hpp> #include <boost/hana/map.hpp> #include <boost/hana/string.hpp> #include <string> namespace hana = boost::hana; static auto m1 = hana::make_map( hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>), hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<std::string>) ); static auto m2 = hana::make_map( hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>), hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<std::string>), hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>) ); static auto m3 = hana::make_map( hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>), hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<int>), hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<long long>) ); int main() { BOOST_HANA_CONSTANT_CHECK(hana::difference(m1, m2) == m1); BOOST_HANA_CONSTANT_CHECK(hana::difference(m1, m3) == hana::make_map()); BOOST_HANA_CONSTANT_CHECK(hana::difference(m3, m1) == hana::make_map( hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<int>) )); BOOST_HANA_CONSTANT_CHECK(hana::difference(m2, m3) == hana::make_map( hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>), hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>) )); }