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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/functional/overload.hpp>
- #include <iostream>
- #include <string>
- namespace hana = boost::hana;
- auto on_string = [](std::string const& s) {
- std::cout << "matched std::string: " << s << std::endl;
- return s;
- };
- auto on_int = [](int i) {
- std::cout << "matched int: " << i << std::endl;
- return i;
- };
- auto f = hana::overload(on_int, on_string);
- int main() {
- // prints "matched int: 1"
- BOOST_HANA_RUNTIME_CHECK(f(1) == 1);
- // prints "matched std::string: abcdef"
- BOOST_HANA_RUNTIME_CHECK(f("abcdef") == std::string{"abcdef"});
- }
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