// Copyright 2010 Daniel James. // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) #include namespace test { struct base {}; std::size_t hash_value(base const&) { return 0; } struct converts { operator base() const { return base(); } }; } int main() { boost::hash hash; test::converts x; hash(x); }