| 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 { |
| 20 | adder(void) : sum_(0) {} |
| 21 | |
| 22 | 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(first: nums.begin(), last: nums.end(), f: add); |
| 30 | return sum_; |
| 31 | } |
| 32 | |
| 33 | private: |
| 34 | int sum_; |
| 35 | }; |
| 36 | //] |
| 37 | |
| 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 |