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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/local_function
- #include <boost/detail/lightweight_test.hpp>
- #include <algorithm>
- //[add_global_functor
- // Unfortunately, cannot be defined locally (so not a real alternative).
- struct global_add { // Unfortunately, boilerplate code to program the class.
- global_add(int& _sum, int _factor): sum(_sum), factor(_factor) {}
- inline void operator()(int num) { // Body uses C++ statement syntax.
- sum += factor * num;
- }
- private: // Unfortunately, cannot bind so repeat variable types.
- int& sum; // Access `sum` by reference.
- const int factor; // Make `factor` constant.
- };
- int main(void) {
- int sum = 0, factor = 10;
- global_add add(sum, factor);
- add(1);
- int nums[] = {2, 3};
- std::for_each(nums, nums + 2, add); // Passed as template parameter.
- BOOST_TEST(sum == 60);
- return boost::report_errors();
- }
- //]
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