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- // Copyright (C) 2009-2012 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0
- // (see accompanying file LICENSE_1_0.txt or a copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // Home at http://www.boost.org/libs/functional/overloaded_function
- #ifndef IDENTITY_HPP_
- #define IDENTITY_HPP_
- //[identity_typeof
- #include <boost/typeof/std/string.hpp> // No need to register `boost::function`.
- //]
- #include <boost/function.hpp>
- #include <string>
- //[identity_decls
- const std::string& identity_s(const std::string& x) // Function (as pointer).
- { return x; }
- int identity_i_impl(int x) { return x; }
- int (&identity_i)(int) = identity_i_impl; // Function reference.
- double identity_d_impl(double x) { return x; }
- boost::function<double (double)> identity_d = identity_d_impl; // Functor.
- //]
- #endif // #include guard
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