| 1 | |
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| 2 | // Copyright (C) 2009-2012 Lorenzo Caminiti |
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| 3 | // Distributed under the Boost Software License, Version 1.0 |
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| 4 | // (see accompanying file LICENSE_1_0.txt or a copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | // Home at http://www.boost.org/libs/local_function |
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| 7 | |
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| 8 | #include <boost/phoenix.hpp> |
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| 9 | #include <boost/detail/lightweight_test.hpp> |
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| 10 | #include <algorithm> |
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| 11 | #include <iostream> |
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| 12 | |
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| 13 | //[add_phoenix |
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| 14 | int main(void) { |
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| 15 | using boost::phoenix::let; |
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| 16 | using boost::phoenix::local_names::_f; |
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| 17 | using boost::phoenix::cref; |
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| 18 | using boost::phoenix::ref; |
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| 19 | using boost::phoenix::arg_names::_1; |
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| 20 | |
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| 21 | int sum = 0, factor = 10; |
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| 22 | int nums[] = {1, 2, 3}; |
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| 23 | |
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| 24 | // Passed to template, `factor` by constant, and defined in expression. |
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| 25 | std::for_each(first: nums, last: nums + 3, f: let(a: _f = cref(t: factor))[ |
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| 26 | // Unfortunately, body cannot use C++ statement syntax. |
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| 27 | ( ref(t&: sum) += _f * _1, _1 ) // Access `sum` by reference. |
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| 28 | ]); |
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| 29 | |
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| 30 | BOOST_TEST(sum == 60); |
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| 31 | return boost::report_errors(); |
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| 32 | } |
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| 33 | //] |
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| 34 | |
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| 35 | |
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