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- // Copyright 2005-2009 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)
- // This example illustrates how to use boost::hash with a custom hash function.
- // The implementation is contained in books.cpp
- #include <cstddef>
- #include <string>
- namespace library
- {
- struct book
- {
- int id;
- std::string author;
- std::string title;
- book(int i, std::string const& a, std::string const& t)
- : id(i), author(a), title(t) {}
- };
- bool operator==(book const&, book const&);
- std::size_t hash_value(book const&);
- }
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