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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | Copyright (c) 2011 Eric Niebler | |
4 | ||
5 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ==============================================================================*/ | |
8 | #include <string> | |
9 | #include <sstream> | |
10 | #include <iostream> | |
11 | #include <boost/detail/lightweight_test.hpp> | |
12 | #include <boost/fusion/container/vector/vector.hpp> | |
13 | #include <boost/fusion/algorithm/iteration/fold.hpp> | |
14 | #include <boost/fusion/container/generation/make_vector.hpp> | |
15 | #include "../sequence/tree.hpp" | |
16 | ||
17 | struct write_string | |
18 | { | |
19 | typedef std::ostream* result_type; | |
20 | ||
21 | template<typename T> | |
22 | std::ostream* operator()(std::ostream* sout, T const& t) const | |
23 | { | |
24 | return &(*sout << t << " "); | |
25 | } | |
26 | }; | |
27 | ||
28 | template<typename Tree> | |
29 | void | |
30 | process_tree(Tree const &tree) | |
31 | { | |
32 | using namespace boost; | |
33 | ||
34 | std::stringstream str; | |
35 | fusion::fold(tree, &str, write_string()); | |
36 | std::string res = str.str(); | |
37 | ||
38 | BOOST_TEST_EQ(res, "a b c 1 2 3 100 e f 0 B 1 h i 4 5 6 j k l "); | |
39 | } | |
40 | ||
41 | int | |
42 | main() | |
43 | { | |
44 | using namespace boost::fusion; | |
45 | process_tree( | |
46 | make_tree( | |
47 | make_vector(double(0),'B') | |
48 | , make_tree( | |
49 | make_vector(1,2,long(3)) | |
50 | , make_tree(make_vector('a','b','c')) | |
51 | , make_tree(make_vector(short('d'),'e','f')) | |
52 | ) | |
53 | , make_tree( | |
54 | make_vector(4,5,6) | |
55 | , make_tree(make_vector(float(1),'h','i')) | |
56 | , make_tree(make_vector('j','k','l')) | |
57 | ) | |
58 | ) | |
59 | ); | |
60 | ||
61 | return boost::report_errors(); | |
62 | } | |
63 |