| [/============================================================================== |
| Copyright (C) 2001-2010 Joel de Guzman |
| Copyright (C) 2001-2010 Hartmut Kaiser |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ===============================================================================/] |
| |
| [section Number List - stuffing numbers into a std::vector] |
| |
| This sample demonstrates a parser for a comma separated list of numbers. The |
| numbers are inserted in a vector using phoenix. |
| |
| [import ../../example/qi/num_list2.cpp] |
| |
| [tutorial_numlist2] |
| |
| The full cpp file for this example can be found here: [@../../example/qi/num_list2.cpp] |
| |
| This, again, is the same parser as before. This time, instead of summing up the |
| numbers, we stuff them in a `std::vector`. `push_back` is supplied by |
| __phoenix__. The expression: |
| |
| push_back(ref(v), _1) |
| |
| appends the parsed number. Like before, `_1` is a __phoenix__ placeholder for |
| the parsed result attribute. Also, like before, `ref(v)` tells __phoenix__ that |
| `v`, the `std::vector`, is a mutable reference. |
| |
| [endsect] |
