| 1 | |
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| 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 "addable.hpp" |
| 14 | #include <boost/local_function.hpp> |
| 15 | #include <boost/type_traits/remove_reference.hpp> |
| 16 | #include <boost/concept_check.hpp> |
| 17 | #include <boost/detail/lightweight_test.hpp> |
| 18 | #include <algorithm> |
| 19 | |
| 20 | //[typeof_template |
| 21 | template<typename T> |
| 22 | T calculate(const T& factor) { |
| 23 | T sum = 0; |
| 24 | |
| 25 | void BOOST_LOCAL_FUNCTION_TPL(const bind factor, bind& sum, T num) { |
| 26 | // Local function `TYPEOF` does not need `typename`. |
| 27 | BOOST_CONCEPT_ASSERT((Addable<typename boost::remove_reference< |
| 28 | BOOST_LOCAL_FUNCTION_TYPEOF(sum)>::type>)); |
| 29 | sum += factor * num; |
| 30 | } BOOST_LOCAL_FUNCTION_NAME_TPL(add) |
| 31 | |
| 32 | add(6); |
| 33 | return sum; |
| 34 | } |
| 35 | //] |
| 36 | |
| 37 | int main(void) { |
| 38 | BOOST_TEST(calculate(10) == 60); |
| 39 | return boost::report_errors(); |
| 40 | } |
| 41 | |
| 42 | #endif // VARIADIC_MACROS |
| 43 | |
| 44 |