libs/spirit/doc/qi/num_list2.qbk
[/==============================================================================
Copyright (C) 2001-2011 Joel de Guzman
Copyright (C) 2001-2011 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]
