| |
| // 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/local_function |
| |
| #include <boost/local_function.hpp> |
| #include <boost/function.hpp> |
| #include <boost/typeof/typeof.hpp> |
| #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP() |
| #include <boost/detail/lightweight_test.hpp> |
| |
| BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function, 1) |
| |
| boost::function<int (int)> derivative(boost::function<int (int)>& f, int dx) { |
| int BOOST_LOCAL_FUNCTION( (bind& f) (const bind dx) (int x) ) { |
| return (f(x + dx) - f(x)) / dx; |
| } BOOST_LOCAL_FUNCTION_NAME(deriv) |
| |
| return deriv; |
| } |
| |
| int main(void) { |
| int BOOST_LOCAL_FUNCTION( (int x) ) { |
| return x + 4; |
| } BOOST_LOCAL_FUNCTION_NAME(add2) |
| |
| boost::function<int (int)> a2 = add2; |
| boost::function<int (int)> d2 = derivative(a2, 2); |
| BOOST_TEST(d2(6) == 1); |
| return boost::report_errors(); |
| } |
| |