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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/local_function.hpp>
- #include <boost/typeof/typeof.hpp>
- #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
- #include <boost/detail/lightweight_test.hpp>
- #include <vector>
- #include <algorithm>
- struct v;
- BOOST_TYPEOF_REGISTER_TYPE(v) // Register before `bind this_` below.
- struct v {
- std::vector<int> nums;
-
- v(const std::vector<int>& numbers): nums(numbers) {}
- void change_sign_all(const std::vector<int>& indices) {
- void BOOST_LOCAL_FUNCTION(bind this_, int i) { // Bind object `this`.
- this_->nums.at(i) = -this_->nums.at(i);
- } BOOST_LOCAL_FUNCTION_NAME(complement)
- std::for_each(indices.begin(), indices.end(), complement);
- }
- };
- int main(void) {
- std::vector<int> n(3);
- n[0] = 1; n[1] = 2; n[2] = 3;
- std::vector<int> i(2);
- i[0] = 0; i[1] = 2; // Will change n[0] and n[2] but not n[1].
-
- v vn(n);
- vn.change_sign_all(i);
-
- BOOST_TEST(vn.nums.at(0) == -1);
- BOOST_TEST(vn.nums.at(1) == 2);
- BOOST_TEST(vn.nums.at(2) == -3);
- return boost::report_errors();
- }
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