36 lines
1.0 KiB
C++
36 lines
1.0 KiB
C++
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// Copyright (C) 2009-2012 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0
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// (see accompanying file LICENSE_1_0.txt or a copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Home at http://www.boost.org/libs/local_function
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#include <boost/detail/lightweight_test.hpp>
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//[add_local_functor
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int main(void) {
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int sum = 0, factor = 10;
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struct local_add { // Unfortunately, boilerplate code to program the class.
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local_add(int& _sum, int _factor): sum(_sum), factor(_factor) {}
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inline void operator()(int num) { // Body uses C++ statement syntax.
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sum += factor * num;
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}
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private: // Unfortunately, cannot bind so repeat variable types.
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int& sum; // Access `sum` by reference.
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const int factor; // Make `factor` constant.
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} add(sum, factor);
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add(1);
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int nums[] = {2, 3};
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// Unfortunately, cannot pass as template parameter to `std::for_each`.
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for(size_t i = 0; i < 2; ++i) add(nums[i]);
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BOOST_TEST(sum == 60);
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return boost::report_errors();
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}
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//]
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