| 1 | // Boost.Range library |
|---|---|
| 2 | // |
| 3 | // Copyright Robin Eckert 2015. Use, modification and distribution is |
| 4 | // subject to the Boost Software License, Version 1.0. (See |
| 5 | // accompanying file LICENSE_1_0.txt or copy at |
| 6 | // http://www.boost.org/LICENSE_1_0.txt) |
| 7 | // |
| 8 | // |
| 9 | // For more information, see http://www.boost.org/libs/range/ |
| 10 | // |
| 11 | //[ref_unwrapped_example |
| 12 | #include <boost/range/adaptor/ref_unwrapped.hpp> |
| 13 | #include <iostream> |
| 14 | #include <vector> |
| 15 | |
| 16 | struct example |
| 17 | { |
| 18 | int value; |
| 19 | }; |
| 20 | |
| 21 | int main(int argc, const char* argv[]) |
| 22 | { |
| 23 | //<- |
| 24 | #if !defined(BOOST_NO_CXX11_DECLTYPE) \ |
| 25 | && !defined(BOOST_NO_CXX11_RANGE_BASED_FOR) \ |
| 26 | && !defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX) \ |
| 27 | && !defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) |
| 28 | //-> |
| 29 | using boost::adaptors::ref_unwrapped; |
| 30 | |
| 31 | example one{.value: 1}; |
| 32 | example two{.value: 2}; |
| 33 | example three{.value: 3}; |
| 34 | |
| 35 | std::vector<std::reference_wrapper<example> > input{one, two, three}; |
| 36 | |
| 37 | for (auto&& entry : input | ref_unwrapped) |
| 38 | { |
| 39 | std::cout << entry.value; |
| 40 | } |
| 41 | |
| 42 | return 0; |
| 43 | //<- |
| 44 | #endif |
| 45 | //-> |
| 46 | } |
| 47 | //] |
| 48 |