1 
2 // Copyright (C) 2009-2012 Lorenzo Caminiti
3 // Distributed under the Boost Software License, Version 1.0
4 // (see accompanying file LICENSE_1_0.txt or a copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 // Home at http://www.boost.org/libs/local_function
7 
8 #include "addable.hpp"
9 #include <boost/local_function.hpp>
10 #include <boost/type_traits/remove_reference.hpp>
11 #include <boost/concept_check.hpp>
12 #include <boost/detail/lightweight_test.hpp>
13 #include <algorithm>
14 
15 template<typename T>
calculate(const T & factor)16 T calculate(const T& factor) {
17     T sum = 0;
18 
19     void BOOST_LOCAL_FUNCTION_TPL( (const bind factor) (bind& sum) (T num) ) {
20         BOOST_CONCEPT_ASSERT((Addable<typename boost::remove_reference<
21                 BOOST_LOCAL_FUNCTION_TYPEOF(sum)>::type>));
22         sum += factor * num;
23     } BOOST_LOCAL_FUNCTION_NAME_TPL(add)
24 
25     add(6);
26     return sum;
27 }
28 
main(void)29 int main(void) {
30     BOOST_TEST(calculate(10) == 60);
31     return boost::report_errors();
32 }
33 
34