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 <boost/config.hpp>
9 #ifdef BOOST_NO_CXX11_VARIADIC_MACROS
10 #   error "variadic macros required"
11 #else
12 
13 #include <boost/local_function.hpp>
14 #include <boost/detail/lightweight_test.hpp>
15 #include <vector>
16 #include <algorithm>
17 
18 //[add_typed
19 struct adder {
adderadder20     adder(void) : sum_(0) {}
21 
sumadder22     int sum(const std::vector<int>& nums, const int& factor = 10) {
23         // Explicitly specify bound variable and return types (no type-of).
24         BOOST_LOCAL_FUNCTION(const bind(const int&) factor,
25                 bind(adder*) this_, int num, return int) {
26             return this_->sum_ += factor * num;
27         } BOOST_LOCAL_FUNCTION_NAME(add)
28 
29         std::for_each(nums.begin(), nums.end(), add);
30         return sum_;
31     }
32 
33 private:
34     int sum_;
35 };
36 //]
37 
main(void)38 int main(void) {
39     std::vector<int> v(3);
40     v[0] = 1; v[1] = 2; v[2] = 3;
41 
42     BOOST_TEST(adder().sum(v) == 60);
43     return boost::report_errors();
44 }
45 
46 #endif // VARIADIC_MACROS
47 
48